25143990 has 16 divisors (see below), whose sum is σ = 60345648. Its totient is φ = 6705056.

The previous prime is 25143931. The next prime is 25144019. The reversal of 25143990 is 9934152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419037 + ... + 419096.

It is an arithmetic number, because the mean of its divisors is an integer number (3771603).

Almost surely, 2^25143990 is an apocalyptic number.

25143990 is an abundant number, since it is smaller than the sum of its proper divisors (35201658).

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

25143990 is a wasteful number, since it uses less digits than its factorization.

25143990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838143.

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

The square root of 25143990 is about 5014.3783263731. The cubic root of 25143990 is about 292.9620719153.

The spelling of 25143990 in words is "twenty-five million, one hundred forty-three thousand, nine hundred ninety".