690238827 has 24 divisors (see below), whose sum is σ = 1035600384. Its totient is φ = 459419688.

The previous prime is 690238819. The next prime is 690238847. The reversal of 690238827 is 728832096.

It is not a de Polignac number, because 690238827 - 2³ = 690238819 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (690238807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178638 + ... + 182460.

It is an arithmetic number, because the mean of its divisors is an integer number (43150016).

Almost surely, 2^690238827 is an apocalyptic number.

690238827 is a deficient number, since it is larger than the sum of its proper divisors (345361557).

690238827 is an equidigital number, since it uses as much as digits as its factorization.

690238827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 690238827 is about 26272.3966740760. The cubic root of 690238827 is about 883.7575325640.

The spelling of 690238827 in words is "six hundred ninety million, two hundred thirty-eight thousand, eight hundred twenty-seven".