77949430 has 16 divisors (see below), whose sum is σ = 151102224. Its totient is φ = 28781280.

The previous prime is 77949373. The next prime is 77949463. The reversal of 77949430 is 3494977.

It is a happy number.

It is a super-2 number, since 2×77949430² = 12152227274649800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299676 + ... + 299935.

It is an arithmetic number, because the mean of its divisors is an integer number (9443889).

Almost surely, 2^77949430 is an apocalyptic number.

77949430 is a deficient number, since it is larger than the sum of its proper divisors (73152794).

77949430 is a wasteful number, since it uses less digits than its factorization.

77949430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599631.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 77949430 is about 8828.8974396580. The cubic root of 77949430 is about 427.1735113061.

The spelling of 77949430 in words is "seventy-seven million, nine hundred forty-nine thousand, four hundred thirty".