289269940 has 24 divisors (see below), whose sum is σ = 614789280. Its totient is φ = 114313248.

The previous prime is 289269923. The next prime is 289269949. The reversal of 289269940 is 49962982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289269949) 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, 85470 + ... + 88789.

It is an arithmetic number, because the mean of its divisors is an integer number (25616220).

Almost surely, 2^289269940 is an apocalyptic number.

289269940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289269940 is an abundant number, since it is smaller than the sum of its proper divisors (325519340).

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

289269940 is a wasteful number, since it uses less digits than its factorization.

289269940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174351 (or 174349 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 289269940 is about 17007.9375586812. The cubic root of 289269940 is about 661.3546861557.

The spelling of 289269940 in words is "two hundred eighty-nine million, two hundred sixty-nine thousand, nine hundred forty".