78995764 has 6 divisors (see below), whose sum is σ = 138242594. Its totient is φ = 39497880.

The previous prime is 78995729. The next prime is 78995789. The reversal of 78995764 is 46759987.

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 7728400 = 8442^2 + 2780^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874467 + ... + 9874474.

Almost surely, 2^78995764 is an apocalyptic number.

It is an amenable number.

78995764 is a deficient number, since it is larger than the sum of its proper divisors (59246830).

78995764 is a wasteful number, since it uses less digits than its factorization.

78995764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19748945 (or 19748943 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 55.

The square root of 78995764 is about 8887.9561205037. The cubic root of 78995764 is about 429.0763733672.

The spelling of 78995764 in words is "seventy-eight million, nine hundred ninety-five thousand, seven hundred sixty-four".