77839950 has 24 divisors (see below), whose sum is σ = 193043448. Its totient is φ = 20757280.

The previous prime is 77839921. The next prime is 77839961. The reversal of 77839950 is 5993877.

It is a self number, because there is not a number n which added to its sum of digits gives 77839950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259317 + ... + 259616.

It is an arithmetic number, because the mean of its divisors is an integer number (8043477).

Almost surely, 2^77839950 is an apocalyptic number.

77839950 is an abundant number, since it is smaller than the sum of its proper divisors (115203498).

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

77839950 is a wasteful number, since it uses less digits than its factorization.

77839950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518948 (or 518943 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 77839950 is about 8822.6951664443. The cubic root of 77839950 is about 426.9734291594.

The spelling of 77839950 in words is "seventy-seven million, eight hundred thirty-nine thousand, nine hundred fifty".