227981990 has 16 divisors (see below), whose sum is σ = 410739120. Its totient is φ = 91110240.

The previous prime is 227981983. The next prime is 227982031. The reversal of 227981990 is 99189722.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976 + ... + 21444.

It is an arithmetic number, because the mean of its divisors is an integer number (25671195).

Almost surely, 2^227981990 is an apocalyptic number.

227981990 is a deficient number, since it is larger than the sum of its proper divisors (182757130).

227981990 is a wasteful number, since it uses less digits than its factorization.

227981990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20647.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 227981990 is about 15099.0724880703. The cubic root of 227981990 is about 610.8953884562.

The spelling of 227981990 in words is "two hundred twenty-seven million, nine hundred eighty-one thousand, nine hundred ninety".