77272864 has 24 divisors (see below), whose sum is σ = 155844108. Its totient is φ = 37693440.

The previous prime is 77272813. The next prime is 77272873. The reversal of 77272864 is 46827277.

It can be written as a sum of positive squares in 2 ways, for example, as 60528400 + 16744464 = 7780^2 + 4092^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77272864.

It is an unprimeable number.

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, 28137 + ... + 30760.

Almost surely, 2^77272864 is an apocalyptic number.

It is an amenable number.

77272864 is an abundant number, since it is smaller than the sum of its proper divisors (78571244).

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

77272864 is a wasteful number, since it uses less digits than its factorization.

77272864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58948 (or 58940 counting only the distinct ones).

The product of its digits is 263424, while the sum is 43.

The square root of 77272864 is about 8790.4985069107. The cubic root of 77272864 is about 425.9340269749.

The spelling of 77272864 in words is "seventy-seven million, two hundred seventy-two thousand, eight hundred sixty-four".