25391490 has 16 divisors (see below), whose sum is σ = 60939648. Its totient is φ = 6771056.

The previous prime is 25391479. The next prime is 25391533. The reversal of 25391490 is 9419352.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423162 + ... + 423221.

It is an arithmetic number, because the mean of its divisors is an integer number (3808728).

Almost surely, 2^25391490 is an apocalyptic number.

25391490 is an abundant number, since it is smaller than the sum of its proper divisors (35548158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25391490 is a wasteful number, since it uses less digits than its factorization.

25391490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846393.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 25391490 is about 5038.9969239919. The cubic root of 25391490 is about 293.9201736166.

The spelling of 25391490 in words is "twenty-five million, three hundred ninety-one thousand, four hundred ninety".