289642442 has 4 divisors (see below), whose sum is σ = 434463666. Its totient is φ = 144821220.

The previous prime is 289642433. The next prime is 289642469. The reversal of 289642442 is 244246982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 235898881 + 53743561 = 15359^2 + 7331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 289642442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72410609 + ... + 72410612.

Almost surely, 2^289642442 is an apocalyptic number.

289642442 is a deficient number, since it is larger than the sum of its proper divisors (144821224).

289642442 is a wasteful number, since it uses less digits than its factorization.

289642442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144821223.

The product of its digits is 221184, while the sum is 41.

The square root of 289642442 is about 17018.8848635861. The cubic root of 289642442 is about 661.6384467982.

The spelling of 289642442 in words is "two hundred eighty-nine million, six hundred forty-two thousand, four hundred forty-two".