690128870 has 16 divisors (see below), whose sum is σ = 1243070928. Its totient is φ = 275865120.

The previous prime is 690128867. The next prime is 690128893. The reversal of 690128870 is 78821096.

It is a congruent number.

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, 7229 + ... + 37848.

It is an arithmetic number, because the mean of its divisors is an integer number (77691933).

Almost surely, 2^690128870 is an apocalyptic number.

690128870 is a deficient number, since it is larger than the sum of its proper divisors (552942058).

690128870 is a wasteful number, since it uses less digits than its factorization.

690128870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46615.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 690128870 is about 26270.3039571300. The cubic root of 690128870 is about 883.7106017125.

The spelling of 690128870 in words is "six hundred ninety million, one hundred twenty-eight thousand, eight hundred seventy".