78700772 has 6 divisors (see below), whose sum is σ = 137726358. Its totient is φ = 39350384.

The previous prime is 78700763. The next prime is 78700777. The reversal of 78700772 is 27700787.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 10407076 = 8264^2 + 3226^2 .

It is not an unprimeable number, because it can be changed into a prime (78700777) 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 as a sum of consecutive naturals, namely, 9837593 + ... + 9837600.

It is an arithmetic number, because the mean of its divisors is an integer number (22954393).

Almost surely, 2^78700772 is an apocalyptic number.

It is an amenable number.

78700772 is a deficient number, since it is larger than the sum of its proper divisors (59025586).

78700772 is a wasteful number, since it uses less digits than its factorization.

78700772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19675197 (or 19675195 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 78700772 is about 8871.3455574676. The cubic root of 78700772 is about 428.5416106027.

The spelling of 78700772 in words is "seventy-eight million, seven hundred thousand, seven hundred seventy-two".