78020620 has 12 divisors (see below), whose sum is σ = 163843344. Its totient is φ = 31208240.

The previous prime is 78020609. The next prime is 78020627. The reversal of 78020620 is 2602087.

It is not an unprimeable number, because it can be changed into a prime (78020627) 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, 1950496 + ... + 1950535.

It is an arithmetic number, because the mean of its divisors is an integer number (13653612).

Almost surely, 2^78020620 is an apocalyptic number.

It is an amenable number.

78020620 is an abundant number, since it is smaller than the sum of its proper divisors (85822724).

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

78020620 is a wasteful number, since it uses less digits than its factorization.

78020620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901040 (or 3901038 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 78020620 is about 8832.9281668086. The cubic root of 78020620 is about 427.3035153748.

The spelling of 78020620 in words is "seventy-eight million, twenty thousand, six hundred twenty".