3940400794 has 64 divisors (see below), whose sum is σ = 6943812480. Its totient is φ = 1657221120.

The previous prime is 3940400771. The next prime is 3940400809. The reversal of 3940400794 is 4970040493.

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, 6644562 + ... + 6645154.

It is an arithmetic number, because the mean of its divisors is an integer number (108497070).

Almost surely, 2^3940400794 is an apocalyptic number.

3940400794 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

3940400794 is a deficient number, since it is larger than the sum of its proper divisors (3003411686).

3940400794 is a wasteful number, since it uses less digits than its factorization.

3940400794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 3940400794 is about 62772.6118143892. The cubic root of 3940400794 is about 1579.4775811161.

The spelling of 3940400794 in words is "three billion, nine hundred forty million, four hundred thousand, seven hundred ninety-four".