238406220 has 96 divisors (see below), whose sum is σ = 798786240. Its totient is φ = 58682880.

The previous prime is 238406219. The next prime is 238406251. The reversal of 238406220 is 22604832.

238406220 is a `hidden beast` number, since 2 + 38 + 4 + 0 + 622 + 0 = 666.

238406220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9961 + ... + 24000.

It is an arithmetic number, because the mean of its divisors is an integer number (8320690).

Almost surely, 2^238406220 is an apocalyptic number.

238406220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238406220 is an abundant number, since it is smaller than the sum of its proper divisors (560380020).

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

238406220 is a wasteful number, since it uses less digits than its factorization.

238406220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33992 (or 33984 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 238406220 is about 15440.4086733480. The cubic root of 238406220 is about 620.0678212315.

The spelling of 238406220 in words is "two hundred thirty-eight million, four hundred six thousand, two hundred twenty".