306990406 has 16 divisors (see below), whose sum is σ = 474107760. Its totient is φ = 148975200.

The previous prime is 306990401. The next prime is 306990413. The reversal of 306990406 is 604099603.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306990401) 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, 26056 + ... + 35956.

It is an arithmetic number, because the mean of its divisors is an integer number (29631735).

Almost surely, 2^306990406 is an apocalyptic number.

306990406 is a deficient number, since it is larger than the sum of its proper divisors (167117354).

306990406 is a wasteful number, since it uses less digits than its factorization.

306990406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 306990406 is about 17521.1416865454. The cubic root of 306990406 is about 674.5926438343.

The spelling of 306990406 in words is "three hundred six million, nine hundred ninety thousand, four hundred six".