78251020 has 12 divisors (see below), whose sum is σ = 164327184. Its totient is φ = 31300400.

The previous prime is 78250999. The next prime is 78251027. The reversal of 78251020 is 2015287.

It is a super-2 number, since 2×78251020² = 12246444262080800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78251027) 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, 1956256 + ... + 1956295.

It is an arithmetic number, because the mean of its divisors is an integer number (13693932).

Almost surely, 2^78251020 is an apocalyptic number.

It is an amenable number.

78251020 is an abundant number, since it is smaller than the sum of its proper divisors (86076164).

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

78251020 is a wasteful number, since it uses less digits than its factorization.

78251020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912560 (or 3912558 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 78251020 is about 8845.9606600979. The cubic root of 78251020 is about 427.7237204357.

The spelling of 78251020 in words is "seventy-eight million, two hundred fifty-one thousand, twenty".