78160400 has 30 divisors (see below), whose sum is σ = 187781322. Its totient is φ = 31264000.

The previous prime is 78160399. The next prime is 78160429. The reversal of 78160400 is 406187.

It can be written as a sum of positive squares in 3 ways, for example, as 9535744 + 68624656 = 3088^2 + 8284^2 .

It is a super-2 number, since 2×78160400² = 12218096256320000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78160400.

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, 97301 + ... + 98100.

Almost surely, 2^78160400 is an apocalyptic number.

It is an amenable number.

78160400 is an abundant number, since it is smaller than the sum of its proper divisors (109620922).

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

78160400 is a wasteful number, since it uses less digits than its factorization.

78160400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195419 (or 195408 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78160400 is about 8840.8370644414. The cubic root of 78160400 is about 427.5585456109.

Adding to 78160400 its reverse (406187), we get a palindrome (78566587).

The spelling of 78160400 in words is "seventy-eight million, one hundred sixty thousand, four hundred".