690885402 has 16 divisors (see below), whose sum is σ = 1384084800. Its totient is φ = 229909472.

The previous prime is 690885397. The next prime is 690885407. The reversal of 690885402 is 204588096.

It is an interprime number because it is at equal distance from previous prime (690885397) and next prime (690885407).

It is not an unprimeable number, because it can be changed into a prime (690885407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92523 + ... + 99710.

It is an arithmetic number, because the mean of its divisors is an integer number (86505300).

Almost surely, 2^690885402 is an apocalyptic number.

690885402 is an abundant number, since it is smaller than the sum of its proper divisors (693199398).

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

690885402 is a wasteful number, since it uses less digits than its factorization.

690885402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192837.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 690885402 is about 26284.6990091194. The cubic root of 690885402 is about 884.0333970785.

The spelling of 690885402 in words is "six hundred ninety million, eight hundred eighty-five thousand, four hundred two".