3994540164 has 48 divisors (see below), whose sum is σ = 10901284800. Its totient is φ = 1261433088.

The previous prime is 3994540079. The next prime is 3994540177. The reversal of 3994540164 is 4610454993.

3994540164 is a `hidden beast` number, since 3 + 9 + 94 + 540 + 16 + 4 = 666.

3994540164 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3994540164² = 31912702243618293792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971277 + ... + 975380.

It is an arithmetic number, because the mean of its divisors is an integer number (227110100).

Almost surely, 2^3994540164 is an apocalyptic number.

It is an amenable number.

3994540164 is an abundant number, since it is smaller than the sum of its proper divisors (6906744636).

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

3994540164 is a wasteful number, since it uses less digits than its factorization.

3994540164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946689 (or 1946681 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 3994540164 is about 63202.3746705771. The cubic root of 3994540164 is about 1586.6784773227.

The spelling of 3994540164 in words is "three billion, nine hundred ninety-four million, five hundred forty thousand, one hundred sixty-four".