3609723978 has 48 divisors (see below), whose sum is σ = 8945514240. Its totient is φ = 1030524768.

The previous prime is 3609723919. The next prime is 3609724031. The reversal of 3609723978 is 8793279063.

3609723978 is a `hidden beast` number, since 3 + 609 + 7 + 23 + 9 + 7 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156408 + ... + 177996.

It is an arithmetic number, because the mean of its divisors is an integer number (186364880).

Almost surely, 2^3609723978 is an apocalyptic number.

3609723978 is an abundant number, since it is smaller than the sum of its proper divisors (5335790262).

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

3609723978 is a wasteful number, since it uses less digits than its factorization.

3609723978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22931 (or 22928 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 3609723978 is about 60080.9785040157. The cubic root of 3609723978 is about 1533.9975457035.

The spelling of 3609723978 in words is "three billion, six hundred nine million, seven hundred twenty-three thousand, nine hundred seventy-eight".