690628490 has 16 divisors (see below), whose sum is σ = 1243441152. Its totient is φ = 276182544.

The previous prime is 690628489. The next prime is 690628517. The reversal of 690628490 is 94826096.

It is a super-2 number, since 2×690628490² = 953935422399360200, which contains 22 as substring.

It is an unprimeable number.

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, 58247 + ... + 69093.

It is an arithmetic number, because the mean of its divisors is an integer number (77715072).

Almost surely, 2^690628490 is an apocalyptic number.

690628490 is a deficient number, since it is larger than the sum of its proper divisors (552812662).

690628490 is a wasteful number, since it uses less digits than its factorization.

690628490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17221.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 690628490 is about 26279.8114529005. The cubic root of 690628490 is about 883.9238048821.

The spelling of 690628490 in words is "six hundred ninety million, six hundred twenty-eight thousand, four hundred ninety".