25000400 has 30 divisors (see below), whose sum is σ = 60064422. Its totient is φ = 10000000.

The previous prime is 25000373. The next prime is 25000411. The reversal of 25000400 is 400052.

It can be written as a sum of positive squares in 3 ways, for example, as 8904256 + 16096144 = 2984^2 + 4012^2 .

It is a sliding number, since 25000400 = 400 + 25000000 and 1/400 + 1/25000000 = 0.0025000400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30851 + ... + 31650.

Almost surely, 2^25000400 is an apocalyptic number.

25000400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25000400 is an abundant number, since it is smaller than the sum of its proper divisors (35064022).

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

25000400 is a wasteful number, since it uses less digits than its factorization.

25000400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62519 (or 62508 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 25000400 is about 5000.0399998400. The cubic root of 25000400 is about 292.4033332891.

Adding to 25000400 its reverse (400052), we get a palindrome (25400452).

It can be divided in two parts, 25000 and 400, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 25000400 in words is "twenty-five million, four hundred", and thus it is an aban number.