387238090 has 16 divisors (see below), whose sum is σ = 697640040. Its totient is φ = 154759360.

The previous prime is 387238067. The next prime is 387238099. The reversal of 387238090 is 90832783.

It is a happy number.

387238090 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 368601601 + 18636489 = 19199^2 + 4317^2 .

It is not an unprimeable number, because it can be changed into a prime (387238099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4585 + ... + 28204.

Almost surely, 2^387238090 is an apocalyptic number.

387238090 is a deficient number, since it is larger than the sum of its proper divisors (310401950).

387238090 is a wasteful number, since it uses less digits than its factorization.

387238090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33977.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 387238090 is about 19678.3660398926. The cubic root of 387238090 is about 728.8855767419.

The spelling of 387238090 in words is "three hundred eighty-seven million, two hundred thirty-eight thousand, ninety".