78533772 has 12 divisors (see below), whose sum is σ = 183245496. Its totient is φ = 26177920.

The previous prime is 78533771. The next prime is 78533773. The reversal of 78533772 is 27733587.

It is an interprime number because it is at equal distance from previous prime (78533771) and next prime (78533773).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78533771) 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, 3272229 + ... + 3272252.

It is an arithmetic number, because the mean of its divisors is an integer number (15270458).

Almost surely, 2^78533772 is an apocalyptic number.

It is an amenable number.

78533772 is an abundant number, since it is smaller than the sum of its proper divisors (104711724).

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

78533772 is a wasteful number, since it uses less digits than its factorization.

78533772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544488 (or 6544486 counting only the distinct ones).

The product of its digits is 246960, while the sum is 42.

The square root of 78533772 is about 8861.9282326139. The cubic root of 78533772 is about 428.2382796979.

The spelling of 78533772 in words is "seventy-eight million, five hundred thirty-three thousand, seven hundred seventy-two".