78923620 has 24 divisors (see below), whose sum is σ = 166053888. Its totient is φ = 31509600.

The previous prime is 78923567. The next prime is 78923629. The reversal of 78923620 is 2632987.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78923620.

It is not an unprimeable number, because it can be changed into a prime (78923629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7965 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (6918912).

Almost surely, 2^78923620 is an apocalyptic number.

It is an amenable number.

78923620 is an abundant number, since it is smaller than the sum of its proper divisors (87130268).

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

78923620 is a wasteful number, since it uses less digits than its factorization.

78923620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491 (or 7489 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 78923620 is about 8883.8966675665. The cubic root of 78923620 is about 428.9457135590.

The spelling of 78923620 in words is "seventy-eight million, nine hundred twenty-three thousand, six hundred twenty".