238740740 has 36 divisors (see below), whose sum is σ = 583211916. Its totient is φ = 81853632.

The previous prime is 238740739. The next prime is 238740767. The reversal of 238740740 is 47047832.

It can be written as a sum of positive squares in 2 ways, for example, as 136002244 + 102738496 = 11662^2 + 10136^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 238740740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120827 + ... + 122786.

It is an arithmetic number, because the mean of its divisors is an integer number (16200331).

Almost surely, 2^238740740 is an apocalyptic number.

238740740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238740740 is an abundant number, since it is smaller than the sum of its proper divisors (344471176).

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

238740740 is a wasteful number, since it uses less digits than its factorization.

238740740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243636 (or 243627 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 238740740 is about 15451.2374908937. The cubic root of 238740740 is about 620.3577020169.

The spelling of 238740740 in words is "two hundred thirty-eight million, seven hundred forty thousand, seven hundred forty".