77020344 has 24 divisors (see below), whose sum is σ = 208596960. Its totient is φ = 25673424.

The previous prime is 77020343. The next prime is 77020373. The reversal of 77020344 is 44302077.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77020343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 534792 + ... + 534935.

It is an arithmetic number, because the mean of its divisors is an integer number (8691540).

Almost surely, 2^77020344 is an apocalyptic number.

It is an amenable number.

77020344 is an abundant number, since it is smaller than the sum of its proper divisors (131576616).

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

77020344 is a wasteful number, since it uses less digits than its factorization.

77020344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069739 (or 1069732 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 77020344 is about 8776.1235178181. The cubic root of 77020344 is about 425.4695507030.

The spelling of 77020344 in words is "seventy-seven million, twenty thousand, three hundred forty-four".