77620372 has 6 divisors (see below), whose sum is σ = 135835658. Its totient is φ = 38810184.

The previous prime is 77620363. The next prime is 77620379. The reversal of 77620372 is 27302677.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 25260676 = 7236^2 + 5026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9702543 + ... + 9702550.

Almost surely, 2^77620372 is an apocalyptic number.

It is an amenable number.

77620372 is a deficient number, since it is larger than the sum of its proper divisors (58215286).

77620372 is a wasteful number, since it uses less digits than its factorization.

77620372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19405097 (or 19405095 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 77620372 is about 8810.2424484233. The cubic root of 77620372 is about 426.5715692464.

The spelling of 77620372 in words is "seventy-seven million, six hundred twenty thousand, three hundred seventy-two".