78205344 has 96 divisors (see below), whose sum is σ = 242766720. Its totient is φ = 21568512.

The previous prime is 78205319. The next prime is 78205363. The reversal of 78205344 is 44350287.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×78205344² = 12232151660316672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17482 + ... + 21494.

It is an arithmetic number, because the mean of its divisors is an integer number (2528820).

Almost surely, 2^78205344 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 78205344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121383360).

78205344 is an abundant number, since it is smaller than the sum of its proper divisors (164561376).

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

78205344 is a wasteful number, since it uses less digits than its factorization.

78205344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 78205344 is about 8843.3785399020. The cubic root of 78205344 is about 427.6404818566.

The spelling of 78205344 in words is "seventy-eight million, two hundred five thousand, three hundred forty-four".