393006690 has 24 divisors (see below), whose sum is σ = 1021817628. Its totient is φ = 104801760.

The previous prime is 393006671. The next prime is 393006709. The reversal of 393006690 is 96600393.

It is an interprime number because it is at equal distance from previous prime (393006671) and next prime (393006709).

It can be written as a sum of positive squares in 2 ways, for example, as 387656721 + 5349969 = 19689^2 + 2313^2 .

It is a super-2 number, since 2×393006690² = 308908516769512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2183281 + ... + 2183460.

Almost surely, 2^393006690 is an apocalyptic number.

393006690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

393006690 is an abundant number, since it is smaller than the sum of its proper divisors (628810938).

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

393006690 is a wasteful number, since it uses less digits than its factorization.

393006690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366754 (or 4366751 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 393006690 is about 19824.3963338105. The cubic root of 393006690 is about 732.4871007680.

The spelling of 393006690 in words is "three hundred ninety-three million, six thousand, six hundred ninety".