78092020 has 24 divisors (see below), whose sum is σ = 164642184. Its totient is φ = 31113216.

The previous prime is 78092011. The next prime is 78092083. The reversal of 78092020 is 2029087.

It can be written as a sum of positive squares in 4 ways, for example, as 53846244 + 24245776 = 7338^2 + 4924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78092020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2457 + ... + 12736.

It is an arithmetic number, because the mean of its divisors is an integer number (6860091).

Almost surely, 2^78092020 is an apocalyptic number.

It is an amenable number.

78092020 is an abundant number, since it is smaller than the sum of its proper divisors (86550164).

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

78092020 is a wasteful number, since it uses less digits than its factorization.

78092020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15459 (or 15457 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 78092020 is about 8836.9689373676. The cubic root of 78092020 is about 427.4338235287.

The spelling of 78092020 in words is "seventy-eight million, ninety-two thousand, twenty".