78505344 has 48 divisors (see below), whose sum is σ = 225910620. Its totient is φ = 26168064.

The previous prime is 78505333. The next prime is 78505351. The reversal of 78505344 is 44350587.

78505344 is a `hidden beast` number, since 78 + 50 + 534 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78505299 and 78505308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32922 + ... + 35225.

Almost surely, 2^78505344 is an apocalyptic number.

It is an amenable number.

78505344 is an abundant number, since it is smaller than the sum of its proper divisors (147405276).

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

78505344 is a wasteful number, since it uses less digits than its factorization.

78505344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68167 (or 68152 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 78505344 is about 8860.3241475693. The cubic root of 78505344 is about 428.1866016035.

The spelling of 78505344 in words is "seventy-eight million, five hundred five thousand, three hundred forty-four".