238454840 has 32 divisors (see below), whose sum is σ = 577795680. Its totient is φ = 88044672.

The previous prime is 238454837. The next prime is 238454857. The reversal of 238454840 is 48454832.

It is a junction number, because it is equal to n+sod(n) for n = 238454794 and 238454803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228764 + ... + 229803.

It is an arithmetic number, because the mean of its divisors is an integer number (18056115).

Almost surely, 2^238454840 is an apocalyptic number.

238454840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238454840 is an abundant number, since it is smaller than the sum of its proper divisors (339340840).

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

238454840 is a wasteful number, since it uses less digits than its factorization.

238454840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458591 (or 458587 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 38.

The square root of 238454840 is about 15441.9830332765. The cubic root of 238454840 is about 620.1099700875.

The spelling of 238454840 in words is "two hundred thirty-eight million, four hundred fifty-four thousand, eight hundred forty".