25400490 has 48 divisors (see below), whose sum is σ = 62312544. Its totient is φ = 6625600.

The previous prime is 25400489. The next prime is 25400497. The reversal of 25400490 is 9400452.

It is a self number, because there is not a number n which added to its sum of digits gives 25400490.

It is not an unprimeable number, because it can be changed into a prime (25400497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251440 + ... + 251540.

It is an arithmetic number, because the mean of its divisors is an integer number (1298178).

Almost surely, 2^25400490 is an apocalyptic number.

25400490 is an abundant number, since it is smaller than the sum of its proper divisors (36912054).

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

25400490 is a wasteful number, since it uses less digits than its factorization.

25400490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 25400490 is about 5039.8898797494. The cubic root of 25400490 is about 293.9548961304.

The spelling of 25400490 in words is "twenty-five million, four hundred thousand, four hundred ninety".