28942624627225 has 27 divisors (see below), whose sum is σ = 36003660707613. Its totient is φ = 23080266846240.

The previous prime is 28942624627211. The next prime is 28942624627249. The reversal of 28942624627225 is 52272642624982.

The square root of 28942624627225 is 5379835.

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

It can be written as a sum of positive squares in 4 ways, for example, as 297778667481 + 28644845959744 = 545691^2 + 5352088^2 .

It is not a de Polignac number, because 28942624627225 - 2²⁵ = 28942591072793 is a prime.

It is a super-2 number, since 2×28942624627225² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9387810534 + ... + 9387813616.

Almost surely, 2^{28942624627225} is an apocalyptic number.

28942624627225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28942624627225 is the 5379835-th square number.

28942624627225 is the 2689918-th centered octagonal number.

It is an amenable number.

28942624627225 is a deficient number, since it is larger than the sum of its proper divisors (7061036080388).

28942624627225 is an frugal number, since it uses more digits than its factorization.

28942624627225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6874 (or 3437 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 61.

The spelling of 28942624627225 in words is "twenty-eight trillion, nine hundred forty-two billion, six hundred twenty-four million, six hundred twenty-seven thousand, two hundred twenty-five".