228939861492 has 36 divisors (see below), whose sum is σ = 612750807396. Its totient is φ = 71824270080.

The previous prime is 228939861421. The next prime is 228939861499. The reversal of 228939861492 is 294168939822.

228939861492 is a `hidden beast` number, since 2 + 2 + 8 + 9 + 3 + 9 + 8 + 614 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68808634596 + 160131226896 = 262314^2 + 400164^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×228939861492² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228939861499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187041759 + ... + 187042982.

It is an arithmetic number, because the mean of its divisors is an integer number (17020855761).

Almost surely, 2^228939861492 is an apocalyptic number.

It is an amenable number.

228939861492 is an abundant number, since it is smaller than the sum of its proper divisors (383810945904).

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

228939861492 is a wasteful number, since it uses less digits than its factorization.

228939861492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374084768 (or 374084763 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 228939861492 in words is "two hundred twenty-eight billion, nine hundred thirty-nine million, eight hundred sixty-one thousand, four hundred ninety-two".