228740583 has 4 divisors (see below), whose sum is σ = 304987448. Its totient is φ = 152493720.

The previous prime is 228740579. The next prime is 228740621. The reversal of 228740583 is 385047822.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 228740583 - 2² = 228740579 is a prime.

It is a super-2 number, since 2×228740583² = 104644508622359778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228740513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38123428 + ... + 38123433.

It is an arithmetic number, because the mean of its divisors is an integer number (76246862).

Almost surely, 2^228740583 is an apocalyptic number.

228740583 is a deficient number, since it is larger than the sum of its proper divisors (76246865).

228740583 is an equidigital number, since it uses as much as digits as its factorization.

228740583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76246864.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 228740583 is about 15124.1721426331. The cubic root of 228740583 is about 611.5722078751.

The spelling of 228740583 in words is "two hundred twenty-eight million, seven hundred forty thousand, five hundred eighty-three".