25400312 has 32 divisors (see below), whose sum is σ = 57633120. Its totient is φ = 10245120.

The previous prime is 25400311. The next prime is 25400341. The reversal of 25400312 is 21300452.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25400311) 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 7 ways as a sum of consecutive naturals, for example, 12389 + ... + 14292.

It is an arithmetic number, because the mean of its divisors is an integer number (1801035).

Almost surely, 2^25400312 is an apocalyptic number.

It is an amenable number.

25400312 is an abundant number, since it is smaller than the sum of its proper divisors (32232808).

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

25400312 is a wasteful number, since it uses less digits than its factorization.

25400312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26711 (or 26707 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 25400312 is about 5039.8722206024. The cubic root of 25400312 is about 293.9542094758.

Adding to 25400312 its reverse (21300452), we get a palindrome (46700764).

The spelling of 25400312 in words is "twenty-five million, four hundred thousand, three hundred twelve".