78103020 has 48 divisors (see below), whose sum is σ = 222405120. Its totient is φ = 20473536.

The previous prime is 78102971. The next prime is 78103021. The reversal of 78103020 is 2030187.

It is a super-2 number, since 2×78103020² = 12200163466240800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78103021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7492 + ... + 14571.

It is an arithmetic number, because the mean of its divisors is an integer number (4633440).

Almost surely, 2^78103020 is an apocalyptic number.

It is an amenable number.

78103020 is an abundant number, since it is smaller than the sum of its proper divisors (144302100).

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

78103020 is a wasteful number, since it uses less digits than its factorization.

78103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22134 (or 22132 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 78103020 is about 8837.5913008014. The cubic root of 78103020 is about 427.4538919527.

The spelling of 78103020 in words is "seventy-eight million, one hundred three thousand, twenty".