238861090 has 16 divisors (see below), whose sum is σ = 463023288. Its totient is φ = 88194816.

The previous prime is 238861069. The next prime is 238861099. The reversal of 238861090 is 90168832.

It can be written as a sum of positive squares in 4 ways, for example, as 132503121 + 106357969 = 11511^2 + 10313^2 .

It is not an unprimeable number, because it can be changed into a prime (238861099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918567 + ... + 918826.

Almost surely, 2^238861090 is an apocalyptic number.

238861090 is a deficient number, since it is larger than the sum of its proper divisors (224162198).

238861090 is a wasteful number, since it uses less digits than its factorization.

238861090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837413.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 238861090 is about 15455.1315102784. The cubic root of 238861090 is about 620.4619259650.

It can be divided in two parts, 23886 and 1090, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 238861090 in words is "two hundred thirty-eight million, eight hundred sixty-one thousand, ninety".