77620444 has 12 divisors (see below), whose sum is σ = 148184568. Its totient is φ = 35282000.

The previous prime is 77620427. The next prime is 77620447. The reversal of 77620444 is 44402677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882007 + ... + 882094.

It is an arithmetic number, because the mean of its divisors is an integer number (12348714).

Almost surely, 2^77620444 is an apocalyptic number.

It is an amenable number.

77620444 is a deficient number, since it is larger than the sum of its proper divisors (70564124).

77620444 is a wasteful number, since it uses less digits than its factorization.

77620444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764116 (or 1764114 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 77620444 is about 8810.2465345755. The cubic root of 77620444 is about 426.5717011410.

The spelling of 77620444 in words is "seventy-seven million, six hundred twenty thousand, four hundred forty-four".