238216690 has 8 divisors (see below), whose sum is σ = 428790060. Its totient is φ = 95286672.

The previous prime is 238216687. The next prime is 238216703. The reversal of 238216690 is 96612832.

It can be written as a sum of positive squares in 2 ways, for example, as 234610489 + 3606201 = 15317^2 + 1899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×238216690² = 113494382789112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11910825 + ... + 11910844.

Almost surely, 2^238216690 is an apocalyptic number.

238216690 is a deficient number, since it is larger than the sum of its proper divisors (190573370).

238216690 is a wasteful number, since it uses less digits than its factorization.

238216690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821676.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 238216690 is about 15434.2699859760. The cubic root of 238216690 is about 619.9034622499.

The spelling of 238216690 in words is "two hundred thirty-eight million, two hundred sixteen thousand, six hundred ninety".