78502272 has 64 divisors (see below), whose sum is σ = 210956400. Its totient is φ = 25862144.

The previous prime is 78502253. The next prime is 78502279. The reversal of 78502272 is 27220587.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78502279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33028 + ... + 35324.

Almost surely, 2^78502272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78502272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105478200).

78502272 is an abundant number, since it is smaller than the sum of its proper divisors (132454128).

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

78502272 is a wasteful number, since it uses less digits than its factorization.

78502272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 78502272 is about 8860.1507887846. The cubic root of 78502272 is about 428.1810163939.

The spelling of 78502272 in words is "seventy-eight million, five hundred two thousand, two hundred seventy-two".