77407982 has 4 divisors (see below), whose sum is σ = 116111976. Its totient is φ = 38703990.

The previous prime is 77407951. The next prime is 77407999. The reversal of 77407982 is 28970477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28970477 = 41 ⋅706597.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19351994 + ... + 19351997.

It is an arithmetic number, because the mean of its divisors is an integer number (29027994).

Almost surely, 2^77407982 is an apocalyptic number.

77407982 is a deficient number, since it is larger than the sum of its proper divisors (38703994).

77407982 is a wasteful number, since it uses less digits than its factorization.

77407982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38703993.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 77407982 is about 8798.1806073756. The cubic root of 77407982 is about 426.1821427169.

The spelling of 77407982 in words is "seventy-seven million, four hundred seven thousand, nine hundred eighty-two".