238990136 has 32 divisors (see below), whose sum is σ = 558679680. Its totient is φ = 93112800.

The previous prime is 238990133. The next prime is 238990177. The reversal of 238990136 is 631099832.

It is a junction number, because it is equal to n+sod(n) for n = 238990093 and 238990102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238990133) 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, 193370 + ... + 194601.

It is an arithmetic number, because the mean of its divisors is an integer number (17458740).

Almost surely, 2^238990136 is an apocalyptic number.

It is an amenable number.

238990136 is an abundant number, since it is smaller than the sum of its proper divisors (319689544).

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

238990136 is a wasteful number, since it uses less digits than its factorization.

238990136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387995 (or 387991 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 238990136 is about 15459.3058058892. The cubic root of 238990136 is about 620.5736418231.

The spelling of 238990136 in words is "two hundred thirty-eight million, nine hundred ninety thousand, one hundred thirty-six".