1471987440 has 360 divisors, whose sum is σ = 6274942128. Its totient is φ = 305786880.

The previous prime is 1471987417. The next prime is 1471987441. The reversal of 1471987440 is 447891741.

It is a happy number.

1471987440 is a `hidden beast` number, since 14 + 7 + 198 + 7 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1471987441) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 386184 + ... + 389976.

Almost surely, 2^1471987440 is an apocalyptic number.

1471987440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1471987440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137471064).

1471987440 is an abundant number, since it is smaller than the sum of its proper divisors (4802954688).

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

1471987440 is a wasteful number, since it uses less digits than its factorization.

1471987440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3821 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1471987440 is about 38366.4885023376. The cubic root of 1471987440 is about 1137.5435565175.

The spelling of 1471987440 in words is "one billion, four hundred seventy-one million, nine hundred eighty-seven thousand, four hundred forty".