117251638 has 32 divisors (see below), whose sum is σ = 205486848. Its totient is φ = 49140000.

The previous prime is 117251633. The next prime is 117251657. The reversal of 117251638 is 836152711.

It is a happy number.

It is a super-2 number, since 2×117251638² = 27495893227366088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117251633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214081 + ... + 214627.

It is an arithmetic number, because the mean of its divisors is an integer number (6421464).

Almost surely, 2^117251638 is an apocalyptic number.

117251638 is a deficient number, since it is larger than the sum of its proper divisors (88235210).

117251638 is a wasteful number, since it uses less digits than its factorization.

117251638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 10080, while the sum is 34.

The square root of 117251638 is about 10828.2795494021. The cubic root of 117251638 is about 489.4477159412.

The spelling of 117251638 in words is "one hundred seventeen million, two hundred fifty-one thousand, six hundred thirty-eight".