238366690 has 16 divisors (see below), whose sum is σ = 454299192. Its totient is φ = 89737984.

The previous prime is 238366679. The next prime is 238366699. The reversal of 238366690 is 96663832.

It can be written as a sum of positive squares in 4 ways, for example, as 238362721 + 3969 = 15439^2 + 63^2 .

It is a super-2 number, since 2×238366690² = 113637357803112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238366699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700909 + ... + 701248.

Almost surely, 2^238366690 is an apocalyptic number.

238366690 is a deficient number, since it is larger than the sum of its proper divisors (215932502).

238366690 is a wasteful number, since it uses less digits than its factorization.

238366690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402181.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 238366690 is about 15439.1285375827. The cubic root of 238366690 is about 620.0335483061.

The spelling of 238366690 in words is "two hundred thirty-eight million, three hundred sixty-six thousand, six hundred ninety".