25733138 has 18 divisors (see below), whose sum is σ = 41199093. Its totient is φ = 12052320.

The previous prime is 25733119. The next prime is 25733161. The reversal of 25733138 is 83133752.

It can be written as a sum of positive squares in 2 ways, for example, as 23551609 + 2181529 = 4853^2 + 1477^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3587.

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, 121853 + ... + 122063.

Almost surely, 2^25733138 is an apocalyptic number.

25733138 is a deficient number, since it is larger than the sum of its proper divisors (15465955).

25733138 is an equidigital number, since it uses as much as digits as its factorization.

25733138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 230 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 25733138 is about 5072.7840482323. The cubic root of 25733138 is about 295.2325581680.

Multiplying 25733138 by its sum of digits (32), we get a square (823460416 = 28696²).

The spelling of 25733138 in words is "twenty-five million, seven hundred thirty-three thousand, one hundred thirty-eight".