228312690 has 32 divisors (see below), whose sum is σ = 548424000. Its totient is φ = 60830784.

The previous prime is 228312677. The next prime is 228312701. The reversal of 228312690 is 96213822.

It is a happy number.

It is a super-2 number, since 2×228312690² = 104253368830072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42432 + ... + 47508.

It is an arithmetic number, because the mean of its divisors is an integer number (17138250).

Almost surely, 2^228312690 is an apocalyptic number.

228312690 is an abundant number, since it is smaller than the sum of its proper divisors (320111310).

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

228312690 is a wasteful number, since it uses less digits than its factorization.

228312690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 228312690 is about 15110.0195234818. The cubic root of 228312690 is about 611.1906244993.

The spelling of 228312690 in words is "two hundred twenty-eight million, three hundred twelve thousand, six hundred ninety".