394070664 has 32 divisors (see below), whose sum is σ = 1060960320. Its totient is φ = 121252416.

The previous prime is 394070653. The next prime is 394070669. The reversal of 394070664 is 466070493.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (394070669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631212 + ... + 631835.

It is an arithmetic number, because the mean of its divisors is an integer number (33155010).

Almost surely, 2^394070664 is an apocalyptic number.

It is an amenable number.

394070664 is an abundant number, since it is smaller than the sum of its proper divisors (666889656).

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

394070664 is a wasteful number, since it uses less digits than its factorization.

394070664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263069 (or 1263065 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 394070664 is about 19851.2131619204. The cubic root of 394070664 is about 733.1475178431.

The spelling of 394070664 in words is "three hundred ninety-four million, seventy thousand, six hundred sixty-four".