690435906 has 16 divisors (see below), whose sum is σ = 1425416448. Its totient is φ = 222721200.

The previous prime is 690435847. The next prime is 690435913. The reversal of 690435906 is 609534096.

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, 1855825 + ... + 1856196.

It is an arithmetic number, because the mean of its divisors is an integer number (89088528).

Almost surely, 2^690435906 is an apocalyptic number.

690435906 is an abundant number, since it is smaller than the sum of its proper divisors (734980542).

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

690435906 is a wasteful number, since it uses less digits than its factorization.

690435906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712057.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 690435906 is about 26276.1470919920. The cubic root of 690435906 is about 883.8416355682.

The spelling of 690435906 in words is "six hundred ninety million, four hundred thirty-five thousand, nine hundred six".