238474840 has 32 divisors (see below), whose sum is σ = 538530480. Its totient is φ = 95041152.

The previous prime is 238474829. The next prime is 238474883. The reversal of 238474840 is 48474832.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 238474793 and 238474802.

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, 319 + ... + 21841.

Almost surely, 2^238474840 is an apocalyptic number.

238474840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238474840 is an abundant number, since it is smaller than the sum of its proper divisors (300055640).

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

238474840 is a wasteful number, since it uses less digits than its factorization.

238474840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21811 (or 21807 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 238474840 is about 15442.6306049196. The cubic root of 238474840 is about 620.1273064976.

The spelling of 238474840 in words is "two hundred thirty-eight million, four hundred seventy-four thousand, eight hundred forty".