3682992978 has 72 divisors (see below), whose sum is σ = 9342121932. Its totient is φ = 1045541952.

The previous prime is 3682992961. The next prime is 3682992983. The reversal of 3682992978 is 8792992863.

It can be written as a sum of positive squares in 2 ways, for example, as 3624882849 + 58110129 = 60207^2 + 7623^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 125176 + ... + 151772.

Almost surely, 2^3682992978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3682992978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4671060966).

3682992978 is an abundant number, since it is smaller than the sum of its proper divisors (5659128954).

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

3682992978 is a wasteful number, since it uses less digits than its factorization.

3682992978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26776 (or 26766 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 3682992978 is about 60687.6674292232. The cubic root of 3682992978 is about 1544.3069653867.

The spelling of 3682992978 in words is "three billion, six hundred eighty-two million, nine hundred ninety-two thousand, nine hundred seventy-eight".