690231042 has 24 divisors (see below), whose sum is σ = 1583471916. Its totient is φ = 216542976.

The previous prime is 690231019. The next prime is 690231053. The reversal of 690231042 is 240132096.

It can be written as a sum of positive squares in 2 ways, for example, as 688590081 + 1640961 = 26241^2 + 1281^2 .

It is a junction number, because it is equal to n+sod(n) for n = 690230997 and 690231015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1127523 + ... + 1128134.

Almost surely, 2^690231042 is an apocalyptic number.

690231042 is an abundant number, since it is smaller than the sum of its proper divisors (893240874).

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

690231042 is a wasteful number, since it uses less digits than its factorization.

690231042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255682 (or 2255679 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 690231042 is about 26272.2485143545. The cubic root of 690231042 is about 883.7542100047.

The spelling of 690231042 in words is "six hundred ninety million, two hundred thirty-one thousand, forty-two".