76781418 has 64 divisors (see below), whose sum is σ = 189423360. Its totient is φ = 20247552.

The previous prime is 76781407. The next prime is 76781437. The reversal of 76781418 is 81418767.

It is a happy number.

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 self number, because there is not a number n which added to its sum of digits gives 76781418.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36828 + ... + 38856.

It is an arithmetic number, because the mean of its divisors is an integer number (2959740).

Almost surely, 2^76781418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76781418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94711680).

76781418 is an abundant number, since it is smaller than the sum of its proper divisors (112641942).

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

76781418 is a wasteful number, since it uses less digits than its factorization.

76781418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111.

The product of its digits is 75264, while the sum is 42.

The square root of 76781418 is about 8762.5006704707. The cubic root of 76781418 is about 425.0291430996.

The spelling of 76781418 in words is "seventy-six million, seven hundred eighty-one thousand, four hundred eighteen".