228724157 has 8 divisors (see below), whose sum is σ = 234343872. Its totient is φ = 223171200.

The previous prime is 228724129. The next prime is 228724193. The reversal of 228724157 is 751427822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228724157 - 2¹² = 228720061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228724157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228724127) 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, 9719 + ... + 23492.

It is an arithmetic number, because the mean of its divisors is an integer number (29292984).

Almost surely, 2^228724157 is an apocalyptic number.

It is an amenable number.

228724157 is a deficient number, since it is larger than the sum of its proper divisors (5619715).

228724157 is an equidigital number, since it uses as much as digits as its factorization.

228724157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33379.

The product of its digits is 62720, while the sum is 38.

The square root of 228724157 is about 15123.6290948965. The cubic root of 228724157 is about 611.5575684009.

The spelling of 228724157 in words is "two hundred twenty-eight million, seven hundred twenty-four thousand, one hundred fifty-seven".