1487389440 has 72 divisors (see below), whose sum is σ = 4750362288. Its totient is φ = 396636160.

The previous prime is 1487389417. The next prime is 1487389447. The reversal of 1487389440 is 449837841.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1487389440.

It is not an unprimeable number, because it can be changed into a prime (1487389447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189831 + ... + 197510.

It is an arithmetic number, because the mean of its divisors is an integer number (65977254).

Almost surely, 2^1487389440 is an apocalyptic number.

1487389440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1487389440 is an abundant number, since it is smaller than the sum of its proper divisors (3262972848).

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

1487389440 is an equidigital number, since it uses as much as digits as its factorization.

1487389440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387365 (or 387351 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1487389440 is about 38566.6882166462. The cubic root of 1487389440 is about 1141.4973245789.

The spelling of 1487389440 in words is "one billion, four hundred eighty-seven million, three hundred eighty-nine thousand, four hundred forty".