78383256 has 32 divisors (see below), whose sum is σ = 223952640. Its totient is φ = 22395168.

The previous prime is 78383251. The next prime is 78383273. The reversal of 78383256 is 65238387.

It is a super-2 number, since 2×78383256² = 12287869642323072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78383251) 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, 233116 + ... + 233451.

It is an arithmetic number, because the mean of its divisors is an integer number (6998520).

Almost surely, 2^78383256 is an apocalyptic number.

It is an amenable number.

78383256 is an abundant number, since it is smaller than the sum of its proper divisors (145569384).

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

78383256 is a wasteful number, since it uses less digits than its factorization.

78383256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466583 (or 466579 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 78383256 is about 8853.4318769616. The cubic root of 78383256 is about 427.9645208894.

The spelling of 78383256 in words is "seventy-eight million, three hundred eighty-three thousand, two hundred fifty-six".