3920080646 has 16 divisors (see below), whose sum is σ = 6267955200. Its totient is φ = 1833374088.

The previous prime is 3920080639. The next prime is 3920080657. The reversal of 3920080646 is 6460800293.

It is a super-2 number, since 2×3920080646² = 30734064542287554632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649910 + ... + 655913.

It is an arithmetic number, because the mean of its divisors is an integer number (391747200).

Almost surely, 2^3920080646 is an apocalyptic number.

3920080646 is a deficient number, since it is larger than the sum of its proper divisors (2347874554).

3920080646 is a wasteful number, since it uses less digits than its factorization.

3920080646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305923.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 3920080646 is about 62610.5474021750. The cubic root of 3920080646 is about 1576.7578453310.

The spelling of 3920080646 in words is "three billion, nine hundred twenty million, eighty thousand, six hundred forty-six".