1487278530 has 64 divisors (see below), whose sum is σ = 4005417600. Its totient is φ = 392673600.

The previous prime is 1487278519. The next prime is 1487278531. The reversal of 1487278530 is 358727841.

1487278530 is a `hidden beast` number, since 1 + 48 + 7 + 2 + 78 + 530 = 666.

1487278530 is a nontrivial binomial coefficient, being equal to C(54540, 2).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1487278531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1 + ... + 54539.

It is an arithmetic number, because the mean of its divisors is an integer number (62584650).

Almost surely, 2^1487278530 is an apocalyptic number.

1487278530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1487278530 is the 54539-th triangular number and also the 27270-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1487278530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2002708800).

1487278530 is an abundant number, since it is smaller than the sum of its proper divisors (2518139070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1487278530 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1487278529) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (54656).

1487278530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54656 (or 54650 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 1487278530 is about 38565.2502909031. The cubic root of 1487278530 is about 1141.4689512398.

The spelling of 1487278530 in words is "one billion, four hundred eighty-seven million, two hundred seventy-eight thousand, five hundred thirty".