77623412 has 6 divisors (see below), whose sum is σ = 135840978. Its totient is φ = 38811704.

The previous prime is 77623393. The next prime is 77623421. The reversal of 77623412 is 21432677.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 24245776 = 7306^2 + 4924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9702923 + ... + 9702930.

It is an arithmetic number, because the mean of its divisors is an integer number (22640163).

Almost surely, 2^77623412 is an apocalyptic number.

It is an amenable number.

77623412 is a deficient number, since it is larger than the sum of its proper divisors (58217566).

77623412 is a wasteful number, since it uses less digits than its factorization.

77623412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19405857 (or 19405855 counting only the distinct ones).

The product of its digits is 14112, while the sum is 32.

The square root of 77623412 is about 8810.4149732008. The cubic root of 77623412 is about 426.5771380621.

The spelling of 77623412 in words is "seventy-seven million, six hundred twenty-three thousand, four hundred twelve".