77312284 has 12 divisors (see below), whose sum is σ = 154624624. Its totient is φ = 33133824.

The previous prime is 77312281. The next prime is 77312293. The reversal of 77312284 is 48221377.

77312284 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77312281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380549 + ... + 1380604.

Almost surely, 2^77312284 is an apocalyptic number.

It is an amenable number.

77312284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77312284 is a wasteful number, since it uses less digits than its factorization.

77312284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761164 (or 2761162 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 77312284 is about 8792.7404146830. The cubic root of 77312284 is about 426.0064433625.

The spelling of 77312284 in words is "seventy-seven million, three hundred twelve thousand, two hundred eighty-four".