189257481 has 24 divisors (see below), whose sum is σ = 330804864. Its totient is φ = 101784960.

The previous prime is 189257473. The next prime is 189257503. The reversal of 189257481 is 184752981.

It is not a de Polignac number, because 189257481 - 2³ = 189257473 is a prime.

It is a super-2 number, since 2×189257481² = 71636788228930722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189257881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87285 + ... + 89426.

It is an arithmetic number, because the mean of its divisors is an integer number (13783536).

Almost surely, 2^189257481 is an apocalyptic number.

It is an amenable number.

189257481 is a deficient number, since it is larger than the sum of its proper divisors (141547383).

189257481 is a wasteful number, since it uses less digits than its factorization.

189257481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176741 (or 176738 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 189257481 is about 13757.0883910804. The cubic root of 189257481 is about 574.1398415690.

The spelling of 189257481 in words is "one hundred eighty-nine million, two hundred fifty-seven thousand, four hundred eighty-one".