77701920 has 48 divisors (see below), whose sum is σ = 244762560. Its totient is φ = 20720384.

The previous prime is 77701913. The next prime is 77701957. The reversal of 77701920 is 2910777.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80460 + ... + 81419.

It is an arithmetic number, because the mean of its divisors is an integer number (5099220).

Almost surely, 2^77701920 is an apocalyptic number.

It is an amenable number.

77701920 is an abundant number, since it is smaller than the sum of its proper divisors (167060640).

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

77701920 is a wasteful number, since it uses less digits than its factorization.

77701920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161897 (or 161889 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 77701920 is about 8814.8692559788. The cubic root of 77701920 is about 426.7209023937.

The spelling of 77701920 in words is "seventy-seven million, seven hundred one thousand, nine hundred twenty".