28932309025 has 9 divisors (see below), whose sum is σ = 35877117811. Its totient is φ = 23145166840.

The previous prime is 28932309001. The next prime is 28932309059. The reversal of 28932309025 is 52090323982.

The square root of 28932309025 is 170095.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10415631249 + 18516677776 = 102057^2 + 136076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28932309025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 833466 + ... + 867484.

Almost surely, 2^28932309025 is an apocalyptic number.

28932309025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28932309025 is the 170095-th square number.

28932309025 is the 85048-th centered octagonal number.

It is an amenable number.

28932309025 is a deficient number, since it is larger than the sum of its proper divisors (6944808786).

28932309025 is an frugal number, since it uses more digits than its factorization.

28932309025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68048 (or 34024 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 28932309025 in words is "twenty-eight billion, nine hundred thirty-two million, three hundred nine thousand, twenty-five".