25890400 has 36 divisors (see below), whose sum is σ = 63206892. Its totient is φ = 10355840.

The previous prime is 25890353. The next prime is 25890401. The reversal of 25890400 is 409852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15382 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (1755747).

Almost surely, 2^25890400 is an apocalyptic number.

25890400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25890400 is an abundant number, since it is smaller than the sum of its proper divisors (37316492).

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

25890400 is a wasteful number, since it uses less digits than its factorization.

25890400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32383 (or 32370 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 25890400 is about 5088.2609995950. The cubic root of 25890400 is about 295.8327518779.

The spelling of 25890400 in words is "twenty-five million, eight hundred ninety thousand, four hundred".