77984212 has 12 divisors (see below), whose sum is σ = 137227636. Its totient is φ = 38776320.

The previous prime is 77984209. The next prime is 77984213. The reversal of 77984212 is 21248977.

It can be written as a sum of positive squares in 2 ways, for example, as 36433296 + 41550916 = 6036^2 + 6446^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77984213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53133 + ... + 54580.

Almost surely, 2^77984212 is an apocalyptic number.

It is an amenable number.

77984212 is a deficient number, since it is larger than the sum of its proper divisors (59243424).

77984212 is a wasteful number, since it uses less digits than its factorization.

77984212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107898 (or 107896 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 77984212 is about 8830.8670016030. The cubic root of 77984212 is about 427.2370385599.

The spelling of 77984212 in words is "seventy-seven million, nine hundred eighty-four thousand, two hundred twelve".