78233344 has 72 divisors (see below), whose sum is σ = 180280800. Its totient is φ = 33189888.

The previous prime is 78233291. The next prime is 78233347. The reversal of 78233344 is 44333287.

It is a happy number.

It is a super-2 number, since 2×78233344² = 12240912226844672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78233347) 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, 266862 + ... + 267154.

It is an arithmetic number, because the mean of its divisors is an integer number (2503900).

Almost surely, 2^78233344 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 78233344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90140400).

78233344 is an abundant number, since it is smaller than the sum of its proper divisors (102047456).

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

78233344 is a wasteful number, since it uses less digits than its factorization.

78233344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 451 counting only the distinct ones).

The product of its digits is 48384, while the sum is 34.

The square root of 78233344 is about 8844.9615035906. The cubic root of 78233344 is about 427.6915120639.

The spelling of 78233344 in words is "seventy-eight million, two hundred thirty-three thousand, three hundred forty-four".