25598920 has 32 divisors (see below), whose sum is σ = 58579200. Its totient is φ = 10065088.

The previous prime is 25598917. The next prime is 25598921. The reversal of 25598920 is 2989552.

25598920 = 135² + 136² + ... + 429².

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (25598921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3064 + ... + 7783.

It is an arithmetic number, because the mean of its divisors is an integer number (1830600).

Almost surely, 2^25598920 is an apocalyptic number.

25598920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25598920 is an abundant number, since it is smaller than the sum of its proper divisors (32980280).

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

25598920 is a wasteful number, since it uses less digits than its factorization.

25598920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10917 (or 10913 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 25598920 is about 5059.5375282727. The cubic root of 25598920 is about 294.7183752975.

The spelling of 25598920 in words is "twenty-five million, five hundred ninety-eight thousand, nine hundred twenty".