77929950 has 48 divisors (see below), whose sum is σ = 220878720. Its totient is φ = 17812320.

The previous prime is 77929949. The next prime is 77929961. The reversal of 77929950 is 5992977.

It is a self number, because there is not a number n which added to its sum of digits gives 77929950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36060 + ... + 38159.

It is an arithmetic number, because the mean of its divisors is an integer number (4601640).

Almost surely, 2^77929950 is an apocalyptic number.

77929950 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77929950 is an abundant number, since it is smaller than the sum of its proper divisors (142948770).

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

77929950 is a wasteful number, since it uses less digits than its factorization.

77929950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74241 (or 74236 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 48.

The square root of 77929950 is about 8827.7941752173. The cubic root of 77929950 is about 427.1379239888.

The spelling of 77929950 in words is "seventy-seven million, nine hundred twenty-nine thousand, nine hundred fifty".