206990404 has 24 divisors (see below), whose sum is σ = 365496768. Its totient is φ = 102567840.

The previous prime is 206990369. The next prime is 206990411. The reversal of 206990404 is 404099602.

It is a self number, because there is not a number n which added to its sum of digits gives 206990404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282022 + ... + 282754.

It is an arithmetic number, because the mean of its divisors is an integer number (15229032).

Almost surely, 2^206990404 is an apocalyptic number.

It is an amenable number.

206990404 is a deficient number, since it is larger than the sum of its proper divisors (158506364).

206990404 is a wasteful number, since it uses less digits than its factorization.

206990404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 206990404 is about 14387.1610820203. The cubic root of 206990404 is about 591.5390289331.

The spelling of 206990404 in words is "two hundred six million, nine hundred ninety thousand, four hundred four".