238990813 has 8 divisors (see below), whose sum is σ = 241768800. Its totient is φ = 236223120.

The previous prime is 238990799. The next prime is 238990853. The reversal of 238990813 is 318099832.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 238990813 - 2¹³ = 238982621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238990813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238990853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50263 + ... + 54811.

It is an arithmetic number, because the mean of its divisors is an integer number (30221100).

Almost surely, 2^238990813 is an apocalyptic number.

It is an amenable number.

238990813 is a deficient number, since it is larger than the sum of its proper divisors (2777987).

238990813 is a wasteful number, since it uses less digits than its factorization.

238990813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 238990813 is about 15459.3277020704. The cubic root of 238990813 is about 620.5742277998.

The spelling of 238990813 in words is "two hundred thirty-eight million, nine hundred ninety thousand, eight hundred thirteen".