289823940 has 96 divisors (see below), whose sum is σ = 1030498560. Its totient is φ = 66244608.

The previous prime is 289823921. The next prime is 289823951. The reversal of 289823940 is 49328982.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34557 + ... + 42116.

It is an arithmetic number, because the mean of its divisors is an integer number (10734360).

Almost surely, 2^289823940 is an apocalyptic number.

289823940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289823940 is an abundant number, since it is smaller than the sum of its proper divisors (740674620).

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

289823940 is a wasteful number, since it uses less digits than its factorization.

289823940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76698 (or 76690 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 289823940 is about 17024.2162815209. The cubic root of 289823940 is about 661.7766182849.

The spelling of 289823940 in words is "two hundred eighty-nine million, eight hundred twenty-three thousand, nine hundred forty".