1538870256 has 480 divisors, whose sum is σ = 5739442176. Its totient is φ = 376358400.

The previous prime is 1538870191. The next prime is 1538870257. The reversal of 1538870256 is 6520788351.

1538870256 is a `hidden beast` number, since 15 + 388 + 7 + 0 + 256 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538870257) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41591070 + ... + 41591106.

Almost surely, 2^1538870256 is an apocalyptic number.

1538870256 is a gapful number since it is divisible by the number (16) 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 1538870256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2869721088).

1538870256 is an abundant number, since it is smaller than the sum of its proper divisors (4200571920).

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

1538870256 is a wasteful number, since it uses less digits than its factorization.

1538870256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 1538870256 is about 39228.4368284029. The cubic root of 1538870256 is about 1154.5178940313.

The spelling of 1538870256 in words is "one billion, five hundred thirty-eight million, eight hundred seventy thousand, two hundred fifty-six".