238626990 has 96 divisors (see below), whose sum is σ = 724239360. Its totient is φ = 53376192.

The previous prime is 238626989. The next prime is 238626991. The reversal of 238626990 is 99626832.

238626990 is a `hidden beast` number, since 2 + 386 + 269 + 9 + 0 = 666.

238626990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (238626989) and next prime (238626991).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238626991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25581 + ... + 33639.

It is an arithmetic number, because the mean of its divisors is an integer number (7544160).

Almost surely, 2^238626990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238626990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362119680).

238626990 is an abundant number, since it is smaller than the sum of its proper divisors (485612370).

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

238626990 is a wasteful number, since it uses less digits than its factorization.

238626990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126 (or 8123 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 238626990 is about 15447.5561173928. The cubic root of 238626990 is about 620.2591615125.

The spelling of 238626990 in words is "two hundred thirty-eight million, six hundred twenty-six thousand, nine hundred ninety".