289227990 has 32 divisors (see below), whose sum is σ = 724329216. Its totient is φ = 73773920.

The previous prime is 289227977. The next prime is 289227997. The reversal of 289227990 is 99722982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289227997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208896 + ... + 210275.

It is an arithmetic number, because the mean of its divisors is an integer number (22635288).

Almost surely, 2^289227990 is an apocalyptic number.

289227990 is an abundant number, since it is smaller than the sum of its proper divisors (435101226).

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

289227990 is a wasteful number, since it uses less digits than its factorization.

289227990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419204.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 289227990 is about 17006.7042662592. The cubic root of 289227990 is about 661.3227146687.

The spelling of 289227990 in words is "two hundred eighty-nine million, two hundred twenty-seven thousand, nine hundred ninety".