690079890 has 16 divisors (see below), whose sum is σ = 1656191808. Its totient is φ = 184021296.

The previous prime is 690079889. The next prime is 690079891. The reversal of 690079890 is 98970096.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (690079889) and next prime (690079891).

It is not an unprimeable number, because it can be changed into a prime (690079891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11501302 + ... + 11501361.

It is an arithmetic number, because the mean of its divisors is an integer number (103511988).

Almost surely, 2^690079890 is an apocalyptic number.

690079890 is an abundant number, since it is smaller than the sum of its proper divisors (966111918).

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

690079890 is a wasteful number, since it uses less digits than its factorization.

690079890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23002673.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 690079890 is about 26269.3717092739. The cubic root of 690079890 is about 883.6896949074.

The spelling of 690079890 in words is "six hundred ninety million, seventy-nine thousand, eight hundred ninety".