78367772 has 12 divisors (see below), whose sum is σ = 156735600. Its totient is φ = 33586176.

The previous prime is 78367733. The next prime is 78367777. The reversal of 78367772 is 27776387.

78367772 is an admirable number.

It is a super-2 number, since 2×78367772² = 12283015376487968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78367777) 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, 1399397 + ... + 1399452.

It is an arithmetic number, because the mean of its divisors is an integer number (13061300).

Almost surely, 2^78367772 is an apocalyptic number.

It is an amenable number.

78367772 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.

78367772 is a wasteful number, since it uses less digits than its factorization.

78367772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798860 (or 2798858 counting only the distinct ones).

The product of its digits is 691488, while the sum is 47.

The square root of 78367772 is about 8852.5573706133. The cubic root of 78367772 is about 427.9363386841.

The spelling of 78367772 in words is "seventy-eight million, three hundred sixty-seven thousand, seven hundred seventy-two".