78239020 has 24 divisors (see below), whose sum is σ = 167799744. Its totient is φ = 30629376.

The previous prime is 78238997. The next prime is 78239023. The reversal of 78239020 is 2093287.

It is a super-2 number, since 2×78239020² = 12242688501120800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78239023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40677 + ... + 42556.

It is an arithmetic number, because the mean of its divisors is an integer number (6991656).

Almost surely, 2^78239020 is an apocalyptic number.

It is an amenable number.

78239020 is an abundant number, since it is smaller than the sum of its proper divisors (89560724).

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

78239020 is a wasteful number, since it uses less digits than its factorization.

78239020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83289 (or 83287 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 78239020 is about 8845.2823584100. The cubic root of 78239020 is about 427.7018551316.

The spelling of 78239020 in words is "seventy-eight million, two hundred thirty-nine thousand, twenty".