238763640 has 64 divisors (see below), whose sum is σ = 758432160. Its totient is φ = 59924480.

The previous prime is 238763617. The next prime is 238763659. The reversal of 238763640 is 46367832.

It is a congruent number.

It is an unprimeable number.

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, 56481 + ... + 60560.

Almost surely, 2^238763640 is an apocalyptic number.

238763640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238763640 is an abundant number, since it is smaller than the sum of its proper divisors (519668520).

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

238763640 is a wasteful number, since it uses less digits than its factorization.

238763640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117072 (or 117068 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 238763640 is about 15451.9785140933. The cubic root of 238763640 is about 620.3775362761.

The spelling of 238763640 in words is "two hundred thirty-eight million, seven hundred sixty-three thousand, six hundred forty".