1538890560 has 168 divisors, whose sum is σ = 5571926880. Its totient is φ = 388758528.

The previous prime is 1538890559. The next prime is 1538890571. The reversal of 1538890560 is 650988351.

1538890560 is a `hidden beast` number, since 1 + 5 + 3 + 8 + 89 + 0 + 560 = 666.

It is a super-2 number, since 2×1538890560² = 4736368311314227200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40659 + ... + 68781.

Almost surely, 2^1538890560 is an apocalyptic number.

1538890560 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 1538890560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2785963440).

1538890560 is an abundant number, since it is smaller than the sum of its proper divisors (4033036320).

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

1538890560 is a wasteful number, since it uses less digits than its factorization.

1538890560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28165 (or 28152 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1538890560 is about 39228.6956194060. The cubic root of 1538890560 is about 1154.5229716152.

The spelling of 1538890560 in words is "one billion, five hundred thirty-eight million, eight hundred ninety thousand, five hundred sixty".