25040290 has 32 divisors (see below), whose sum is σ = 51762240. Its totient is φ = 8625600.

The previous prime is 25040273. The next prime is 25040293. The reversal of 25040290 is 9204052.

It is a happy number.

It is a super-2 number, since 2×25040290² = 1254032246568200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (25040293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3901 + ... + 8080.

It is an arithmetic number, because the mean of its divisors is an integer number (1617570).

Almost surely, 2^25040290 is an apocalyptic number.

25040290 is an abundant number, since it is smaller than the sum of its proper divisors (26721950).

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

25040290 is a wasteful number, since it uses less digits than its factorization.

25040290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12018.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25040290 is about 5004.0273780226. The cubic root of 25040290 is about 292.5587677472.

The spelling of 25040290 in words is "twenty-five million, forty thousand, two hundred ninety".