77684412 has 24 divisors (see below), whose sum is σ = 195207376. Its totient is φ = 23902848.

The previous prime is 77684371. The next prime is 77684473. The reversal of 77684412 is 21448677.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 248833 + ... + 249144.

Almost surely, 2^77684412 is an apocalyptic number.

It is an amenable number.

77684412 is an abundant number, since it is smaller than the sum of its proper divisors (117522964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77684412 is a wasteful number, since it uses less digits than its factorization.

77684412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497997 (or 497995 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 77684412 is about 8813.8761053239. The cubic root of 77684412 is about 426.6888500293.

The spelling of 77684412 in words is "seventy-seven million, six hundred eighty-four thousand, four hundred twelve".