77022940 has 12 divisors (see below), whose sum is σ = 161748216. Its totient is φ = 30809168.

The previous prime is 77022919. The next prime is 77022949. The reversal of 77022940 is 4922077.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77022949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925554 + ... + 1925593.

It is an arithmetic number, because the mean of its divisors is an integer number (13479018).

Almost surely, 2^77022940 is an apocalyptic number.

It is an amenable number.

77022940 is an abundant number, since it is smaller than the sum of its proper divisors (84725276).

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

77022940 is a wasteful number, since it uses less digits than its factorization.

77022940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851156 (or 3851154 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77022940 is about 8776.2714178631. The cubic root of 77022940 is about 425.4743308537.

The spelling of 77022940 in words is "seventy-seven million, twenty-two thousand, nine hundred forty".