1012688500 has 24 divisors (see below), whose sum is σ = 2211712776. Its totient is φ = 405075200.

The previous prime is 1012688489. The next prime is 1012688527. The reversal of 1012688500 is 58862101.

It can be written as a sum of positive squares in 4 ways, for example, as 13749264 + 998939236 = 3708^2 + 31606^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012189 + ... + 1013188.

It is an arithmetic number, because the mean of its divisors is an integer number (92154699).

Almost surely, 2^1012688500 is an apocalyptic number.

1012688500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012688500 is an abundant number, since it is smaller than the sum of its proper divisors (1199024276).

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

1012688500 is a wasteful number, since it uses less digits than its factorization.

1012688500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025396 (or 2025384 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1012688500 is about 31822.7670072858. The cubic root of 1012688500 is about 1004.2117363731.

The spelling of 1012688500 in words is "one billion, twelve million, six hundred eighty-eight thousand, five hundred".