78578862 has 32 divisors (see below), whose sum is σ = 171777024. Its totient is φ = 23856000.

The previous prime is 78578809. The next prime is 78578867. The reversal of 78578862 is 26887587.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9264 + ... + 15587.

It is an arithmetic number, because the mean of its divisors is an integer number (5368032).

Almost surely, 2^78578862 is an apocalyptic number.

78578862 is an abundant number, since it is smaller than the sum of its proper divisors (93198162).

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

78578862 is a wasteful number, since it uses less digits than its factorization.

78578862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24904.

The product of its digits is 1505280, while the sum is 51.

The square root of 78578862 is about 8864.4718962835. The cubic root of 78578862 is about 428.3202213868.

The spelling of 78578862 in words is "seventy-eight million, five hundred seventy-eight thousand, eight hundred sixty-two".