25498540 has 24 divisors (see below), whose sum is σ = 55394640. Its totient is φ = 9847488.

The previous prime is 25498507. The next prime is 25498547. The reversal of 25498540 is 4589452.

It is a self number, because there is not a number n which added to its sum of digits gives 25498540.

It is not an unprimeable number, because it can be changed into a prime (25498547) 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 7 ways as a sum of consecutive naturals, for example, 21402 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (2308110).

Almost surely, 2^25498540 is an apocalyptic number.

25498540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25498540 is an abundant number, since it is smaller than the sum of its proper divisors (29896100).

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

25498540 is a wasteful number, since it uses less digits than its factorization.

25498540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44001 (or 43999 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 25498540 is about 5049.6079055705. The cubic root of 25498540 is about 294.3326483008.

It can be divided in two parts, 254985 and 40, that added together give a square (255025 = 505²).

The spelling of 25498540 in words is "twenty-five million, four hundred ninety-eight thousand, five hundred forty".