393970 has 8 divisors (see below), whose sum is σ = 709164. Its totient is φ = 157584.

The previous prime is 393961. The next prime is 393977. The reversal of 393970 is 79393.

It can be written as a sum of positive squares in 2 ways, for example, as 393129 + 841 = 627^2 + 29^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (393977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19689 + ... + 19708.

2³⁹³⁹⁷⁰ is an apocalyptic number.

393970 is a deficient number, since it is larger than the sum of its proper divisors (315194).

393970 is a wasteful number, since it uses less digits than its factorization.

393970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39404.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 393970 is about 627.6702956171. The cubic root of 393970 is about 73.3085085854.

The spelling of 393970 in words is "three hundred ninety-three thousand, nine hundred seventy".