77430225 has 48 divisors (see below), whose sum is σ = 136935680. Its totient is φ = 38491200.

The previous prime is 77430217. The next prime is 77430239. The reversal of 77430225 is 52203477.

It is not a de Polignac number, because 77430225 - 2³ = 77430217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77430192 and 77430201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95070 + ... + 95880.

Almost surely, 2^77430225 is an apocalyptic number.

77430225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77430225 is a deficient number, since it is larger than the sum of its proper divisors (59505455).

77430225 is a wasteful number, since it uses less digits than its factorization.

77430225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 77430225 is about 8799.4445847451. Note that the first 3 decimals coincide. The cubic root of 77430225 is about 426.2229596168. Note that the first 3 decimals are identical.

The spelling of 77430225 in words is "seventy-seven million, four hundred thirty thousand, two hundred twenty-five".