84400025 has 12 divisors (see below), whose sum is σ = 105459024. Its totient is φ = 67002000.

The previous prime is 84400021. The next prime is 84400037. The reversal of 84400025 is 52000448.

It is not a de Polignac number, because 84400025 - 2² = 84400021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84400021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9611 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (8788252).

Almost surely, 2^84400025 is an apocalyptic number.

It is an amenable number.

84400025 is a deficient number, since it is larger than the sum of its proper divisors (21058999).

84400025 is a wasteful number, since it uses less digits than its factorization.

84400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25912 (or 25907 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 84400025 is about 9186.9486229107. The cubic root of 84400025 is about 438.6460185458.

The spelling of 84400025 in words is "eighty-four million, four hundred thousand, twenty-five".