238551440 has 40 divisors (see below), whose sum is σ = 556978488. Its totient is φ = 95016960.

The previous prime is 238551413. The next prime is 238551451. The reversal of 238551440 is 44155832.

It can be written as a sum of positive squares in 4 ways, for example, as 46895104 + 191656336 = 6848^2 + 13844^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 238551397 and 238551406.

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, 13094 + ... + 25466.

Almost surely, 2^238551440 is an apocalyptic number.

238551440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238551440 is an abundant number, since it is smaller than the sum of its proper divisors (318427048).

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

238551440 is a wasteful number, since it uses less digits than its factorization.

238551440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12627 (or 12621 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 238551440 is about 15445.1105531815. The cubic root of 238551440 is about 620.1936959842.

The spelling of 238551440 in words is "two hundred thirty-eight million, five hundred fifty-one thousand, four hundred forty".