78534072 has 48 divisors (see below), whose sum is σ = 213141240. Its totient is φ = 26123328.

The previous prime is 78534061. The next prime is 78534077. The reversal of 78534072 is 27043587.

It is a super-3 number, since 3×78534072³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48378 + ... + 49974.

Almost surely, 2^78534072 is an apocalyptic number.

78534072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78534072 is an abundant number, since it is smaller than the sum of its proper divisors (134607168).

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

78534072 is a wasteful number, since it uses less digits than its factorization.

78534072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 78534072 is about 8861.9451589366. The cubic root of 78534072 is about 428.2388249891.

The spelling of 78534072 in words is "seventy-eight million, five hundred thirty-four thousand, seventy-two".