78944355 has 64 divisors (see below), whose sum is σ = 161817600. Its totient is φ = 35769600.

The previous prime is 78944339. The next prime is 78944357. The reversal of 78944355 is 55344987.

It is not a de Polignac number, because 78944355 - 2⁴ = 78944339 is a prime.

It is a super-2 number, since 2×78944355² = 12464422372732050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78944355.

It is not an unprimeable number, because it can be changed into a prime (78944357) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131055 + ... + 131655.

It is an arithmetic number, because the mean of its divisors is an integer number (2528400).

Almost surely, 2^78944355 is an apocalyptic number.

78944355 is an abundant number, since it is smaller than the sum of its proper divisors (82873245).

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

78944355 is a wasteful number, since it uses less digits than its factorization.

78944355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 78944355 is about 8885.0635900932. The cubic root of 78944355 is about 428.9832748137.

The spelling of 78944355 in words is "seventy-eight million, nine hundred forty-four thousand, three hundred fifty-five".