25709138 has 32 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 9817920.

The previous prime is 25709129. The next prime is 25709153. The reversal of 25709138 is 83190752.

It is a junction number, because it is equal to n+sod(n) for n = 25709098 and 25709107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2843 + ... + 7713.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^25709138 is an apocalyptic number.

25709138 is a deficient number, since it is larger than the sum of its proper divisors (23400622).

25709138 is a wasteful number, since it uses less digits than its factorization.

25709138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 25709138 is about 5070.4179314924. The cubic root of 25709138 is about 295.1407467803.

The spelling of 25709138 in words is "twenty-five million, seven hundred nine thousand, one hundred thirty-eight".