238857949 has 16 divisors (see below), whose sum is σ = 283752000. Its totient is φ = 198616320.

The previous prime is 238857947. The next prime is 238857953. The reversal of 238857949 is 949758832.

It is a cyclic number.

It is not a de Polignac number, because 238857949 - 2¹ = 238857947 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 238857949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238857947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13644 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (17734500).

Almost surely, 2^238857949 is an apocalyptic number.

238857949 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

238857949 is a deficient number, since it is larger than the sum of its proper divisors (44894051).

238857949 is a wasteful number, since it uses less digits than its factorization.

238857949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39468.

The product of its digits is 4354560, while the sum is 55.

The square root of 238857949 is about 15455.0298932095. The cubic root of 238857949 is about 620.4592062818.

The spelling of 238857949 in words is "two hundred thirty-eight million, eight hundred fifty-seven thousand, nine hundred forty-nine".