77983478 has 8 divisors (see below), whose sum is σ = 122061168. Its totient is φ = 37296424.

The previous prime is 77983453. The next prime is 77983487. The reversal of 77983478 is 87438977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847601 + ... + 847692.

It is an arithmetic number, because the mean of its divisors is an integer number (15257646).

Almost surely, 2^77983478 is an apocalyptic number.

77983478 is a deficient number, since it is larger than the sum of its proper divisors (44077690).

77983478 is a wasteful number, since it uses less digits than its factorization.

77983478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695318.

The product of its digits is 2370816, while the sum is 53.

The square root of 77983478 is about 8830.8254427318. The cubic root of 77983478 is about 427.2356981477.

The spelling of 77983478 in words is "seventy-seven million, nine hundred eighty-three thousand, four hundred seventy-eight".