78744272 has 80 divisors (see below), whose sum is σ = 173238912. Its totient is φ = 34467840.

The previous prime is 78744241. The next prime is 78744283. The reversal of 78744272 is 27244787.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256343 + ... + 256649.

Almost surely, 2^78744272 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 78744272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86619456).

78744272 is an abundant number, since it is smaller than the sum of its proper divisors (94494640).

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

78744272 is a wasteful number, since it uses less digits than its factorization.

78744272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its digits is 175616, while the sum is 41.

The square root of 78744272 is about 8873.7969325425. The cubic root of 78744272 is about 428.6205514910.

The spelling of 78744272 in words is "seventy-eight million, seven hundred forty-four thousand, two hundred seventy-two".