78288944 has 30 divisors (see below), whose sum is σ = 161141844. Its totient is φ = 36839680.

The previous prime is 78288943. The next prime is 78288971. The reversal of 78288944 is 44988287.

It is a super-2 number, since 2×78288944² = 12258317505270272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78288892 and 78288901.

It is not an unprimeable number, because it can be changed into a prime (78288943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3842 + ... + 13089.

Almost surely, 2^78288944 is an apocalyptic number.

It is an amenable number.

78288944 is an abundant number, since it is smaller than the sum of its proper divisors (82852900).

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

78288944 is a wasteful number, since it uses less digits than its factorization.

78288944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16973 (or 16950 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 50.

The square root of 78288944 is about 8848.1039776892. The cubic root of 78288944 is about 427.7928073928.

The spelling of 78288944 in words is "seventy-eight million, two hundred eighty-eight thousand, nine hundred forty-four".