78333072 has 20 divisors (see below), whose sum is σ = 202360560. Its totient is φ = 26111008.

The previous prime is 78333071. The next prime is 78333091. The reversal of 78333072 is 27033387.

It is a happy number.

It is a super-2 number, since 2×78333072² = 12272140337914368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78333071) 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, 815922 + ... + 816017.

It is an arithmetic number, because the mean of its divisors is an integer number (10118028).

Almost surely, 2^78333072 is an apocalyptic number.

It is an amenable number.

78333072 is an abundant number, since it is smaller than the sum of its proper divisors (124027488).

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

78333072 is a wasteful number, since it uses less digits than its factorization.

78333072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631950 (or 1631944 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 78333072 is about 8850.5972679814. The cubic root of 78333072 is about 427.8731682302.

The spelling of 78333072 in words is "seventy-eight million, three hundred thirty-three thousand, seventy-two".