289998522 has 48 divisors (see below), whose sum is σ = 708368640. Its totient is φ = 87876360.

The previous prime is 289998509. The next prime is 289998523. The reversal of 289998522 is 225899982.

289998522 is a `hidden beast` number, since 28 + 9 + 9 + 98 + 522 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (289998523) 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, 15658 + ... + 28725.

It is an arithmetic number, because the mean of its divisors is an integer number (14757680).

Almost surely, 2^289998522 is an apocalyptic number.

289998522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

289998522 is an abundant number, since it is smaller than the sum of its proper divisors (418370118).

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

289998522 is a wasteful number, since it uses less digits than its factorization.

289998522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44416 (or 44399 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 289998522 is about 17029.3429702969. The cubic root of 289998522 is about 661.9094703135.

The spelling of 289998522 in words is "two hundred eighty-nine million, nine hundred ninety-eight thousand, five hundred twenty-two".