389100261 has 16 divisors (see below), whose sum is σ = 570290688. Its totient is φ = 234015600.

The previous prime is 389100227. The next prime is 389100277. The reversal of 389100261 is 162001983.

It is not a de Polignac number, because 389100261 - 2⁷ = 389100133 is a prime.

It is a super-2 number, since 2×389100261² = 302798026220536242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389100211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40681 + ... + 49326.

It is an arithmetic number, because the mean of its divisors is an integer number (35643168).

Almost surely, 2^389100261 is an apocalyptic number.

It is an amenable number.

389100261 is a deficient number, since it is larger than the sum of its proper divisors (181190427).

389100261 is a wasteful number, since it uses less digits than its factorization.

389100261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90152.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 389100261 is about 19725.6244768068. The cubic root of 389100261 is about 730.0520767252.

The spelling of 389100261 in words is "three hundred eighty-nine million, one hundred thousand, two hundred sixty-one".