78726020 has 12 divisors (see below), whose sum is σ = 165324684. Its totient is φ = 31490400.

The previous prime is 78726017. The next prime is 78726023. The reversal of 78726020 is 2062787.

It is an interprime number because it is at equal distance from previous prime (78726017) and next prime (78726023).

It can be written as a sum of positive squares in 2 ways, for example, as 53465344 + 25260676 = 7312^2 + 5026^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78726023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968131 + ... + 1968170.

It is an arithmetic number, because the mean of its divisors is an integer number (13777057).

Almost surely, 2^78726020 is an apocalyptic number.

It is an amenable number.

78726020 is an abundant number, since it is smaller than the sum of its proper divisors (86598664).

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

78726020 is a wasteful number, since it uses less digits than its factorization.

78726020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936310 (or 3936308 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 78726020 is about 8872.7684518418. The cubic root of 78726020 is about 428.5874325241.

The spelling of 78726020 in words is "seventy-eight million, seven hundred twenty-six thousand, twenty".