77280925 has 24 divisors (see below), whose sum is σ = 99100800. Its totient is φ = 59748480.

The previous prime is 77280913. The next prime is 77280937. The reversal of 77280925 is 52908277.

It is an interprime number because it is at equal distance from previous prime (77280913) and next prime (77280937).

It is not a de Polignac number, because 77280925 - 2⁵ = 77280893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104206 + ... + 104944.

It is an arithmetic number, because the mean of its divisors is an integer number (4129200).

Almost surely, 2^77280925 is an apocalyptic number.

It is an amenable number.

77280925 is a deficient number, since it is larger than the sum of its proper divisors (21819875).

77280925 is a wasteful number, since it uses less digits than its factorization.

77280925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 77280925 is about 8790.9570013736. The cubic root of 77280925 is about 425.9488374125.

The spelling of 77280925 in words is "seventy-seven million, two hundred eighty thousand, nine hundred twenty-five".