1280972528 has 20 divisors (see below), whose sum is σ = 2707510488. Its totient is φ = 582260160.

The previous prime is 1280972479. The next prime is 1280972551. The reversal of 1280972528 is 8252790821.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638951 + ... + 3639302.

Almost surely, 2^1280972528 is an apocalyptic number.

It is an amenable number.

1280972528 is an abundant number, since it is smaller than the sum of its proper divisors (1426537960).

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

1280972528 is a wasteful number, since it uses less digits than its factorization.

1280972528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278272 (or 7278266 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1280972528 is about 35790.6765513031. The cubic root of 1280972528 is about 1086.0419611008.

The spelling of 1280972528 in words is "one billion, two hundred eighty million, nine hundred seventy-two thousand, five hundred twenty-eight".