25140400 has 30 divisors (see below), whose sum is σ = 60400772. Its totient is φ = 10056000.

The previous prime is 25140389. The next prime is 25140457. The reversal of 25140400 is 404152.

25140400 = T₇₈₁ + T₇₈₂ + ... + T₈₅₅.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 31026 + ... + 31825.

Almost surely, 2^25140400 is an apocalyptic number.

25140400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25140400 is an abundant number, since it is smaller than the sum of its proper divisors (35260372).

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

25140400 is a wasteful number, since it uses less digits than its factorization.

25140400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62869 (or 62858 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25140400 is about 5014.0203429982. The cubic root of 25140400 is about 292.9481284389.

Adding to 25140400 its reverse (404152), we get a palindrome (25544552).

The spelling of 25140400 in words is "twenty-five million, one hundred forty thousand, four hundred".