78889072 has 10 divisors (see below), whose sum is σ = 152847608. Its totient is φ = 39444528.

The previous prime is 78889051. The next prime is 78889073. The reversal of 78889072 is 27098887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78889073) 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, 2465268 + ... + 2465299.

Almost surely, 2^78889072 is an apocalyptic number.

It is an amenable number.

78889072 is a deficient number, since it is larger than the sum of its proper divisors (73958536).

78889072 is a wasteful number, since it uses less digits than its factorization.

78889072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930575 (or 4930569 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 78889072 is about 8881.9520376998. The cubic root of 78889072 is about 428.8831155714.

The spelling of 78889072 in words is "seventy-eight million, eight hundred eighty-nine thousand, seventy-two".