238040100 has 144 divisors (see below), whose sum is σ = 772242240. Its totient is φ = 62899200.

The previous prime is 238040093. The next prime is 238040123. The reversal of 238040100 is 1040832.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 353364 + ... + 354036.

Almost surely, 2^238040100 is an apocalyptic number.

238040100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238040100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386121120).

238040100 is an abundant number, since it is smaller than the sum of its proper divisors (534202140).

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

238040100 is a wasteful number, since it uses less digits than its factorization.

238040100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 238040100 is about 15428.5482142682. The cubic root of 238040100 is about 619.7502462665.

Adding to 238040100 its reverse (1040832), we get a palindrome (239080932).

The spelling of 238040100 in words is "two hundred thirty-eight million, forty thousand, one hundred".