25400390 has 16 divisors (see below), whose sum is σ = 45792432. Its totient is φ = 10144224.

The previous prime is 25400387. The next prime is 25400393. The reversal of 25400390 is 9300452.

It is an interprime number because it is at equal distance from previous prime (25400387) and next prime (25400393).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25400393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6377 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (2862027).

Almost surely, 2^25400390 is an apocalyptic number.

25400390 is a deficient number, since it is larger than the sum of its proper divisors (20392042).

25400390 is a wasteful number, since it uses less digits than its factorization.

25400390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 25400390 is about 5039.8799588879. The cubic root of 25400390 is about 293.9545103698.

The spelling of 25400390 in words is "twenty-five million, four hundred thousand, three hundred ninety".