228139416 has 160 divisors (see below), whose sum is σ = 678142080. Its totient is φ = 71539200.

The previous prime is 228139411. The next prime is 228139421. The reversal of 228139416 is 614931822.

228139416 is a `hidden beast` number, since 228 + 13 + 9 + 416 = 666.

It is an interprime number because it is at equal distance from previous prime (228139411) and next prime (228139421).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228139411) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 823470 + ... + 823746.

It is an arithmetic number, because the mean of its divisors is an integer number (4238388).

Almost surely, 2^228139416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228139416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339071040).

228139416 is an abundant number, since it is smaller than the sum of its proper divisors (450002664).

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

228139416 is a wasteful number, since it uses less digits than its factorization.

228139416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 354 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 228139416 is about 15104.2846901136. The cubic root of 228139416 is about 611.0359678209.

The spelling of 228139416 in words is "two hundred twenty-eight million, one hundred thirty-nine thousand, four hundred sixteen".