78183798 has 128 divisors (see below), whose sum is σ = 207028224. Its totient is φ = 19094400.

The previous prime is 78183757. The next prime is 78183811. The reversal of 78183798 is 89738187.

It is a super-2 number, since 2×78183798² = 12225412539409608, 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 78183798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 759015 + ... + 759117.

It is an arithmetic number, because the mean of its divisors is an integer number (1617408).

Almost surely, 2^78183798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78183798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103514112).

78183798 is an abundant number, since it is smaller than the sum of its proper divisors (128844426).

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

78183798 is a wasteful number, since it uses less digits than its factorization.

78183798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its digits is 677376, while the sum is 51.

The square root of 78183798 is about 8842.1602564079. The cubic root of 78183798 is about 427.6012058189.

The spelling of 78183798 in words is "seventy-eight million, one hundred eighty-three thousand, seven hundred ninety-eight".