77120970 has 16 divisors (see below), whose sum is σ = 185090400. Its totient is φ = 20565584.

The previous prime is 77120957. The next prime is 77120971. The reversal of 77120970 is 7902177.

It is not an unprimeable number, because it can be changed into a prime (77120971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285320 + ... + 1285379.

It is an arithmetic number, because the mean of its divisors is an integer number (11568150).

Almost surely, 2^77120970 is an apocalyptic number.

77120970 is an abundant number, since it is smaller than the sum of its proper divisors (107969430).

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

77120970 is a wasteful number, since it uses less digits than its factorization.

77120970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570709.

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

The square root of 77120970 is about 8781.8545877280. The cubic root of 77120970 is about 425.6547600703.

The spelling of 77120970 in words is "seventy-seven million, one hundred twenty thousand, nine hundred seventy".