289820542 has 16 divisors (see below), whose sum is σ = 475516800. Its totient is φ = 131385240.

The previous prime is 289820533. The next prime is 289820543. The reversal of 289820542 is 245028982.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 289820495 and 289820504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289820543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9042 + ... + 25717.

It is an arithmetic number, because the mean of its divisors is an integer number (29719800).

Almost surely, 2^289820542 is an apocalyptic number.

289820542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

289820542 is a deficient number, since it is larger than the sum of its proper divisors (185696258).

289820542 is a wasteful number, since it uses less digits than its factorization.

289820542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35151.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 289820542 is about 17024.1164822143. The cubic root of 289820542 is about 661.7740319725.

The spelling of 289820542 in words is "two hundred eighty-nine million, eight hundred twenty thousand, five hundred forty-two".