228721130392 has 8 divisors (see below), whose sum is σ = 428852119500. Its totient is φ = 114360565192.

The previous prime is 228721130387. The next prime is 228721130419. The reversal of 228721130392 is 293031127822.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×228721130392³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14295070642 + ... + 14295070657.

Almost surely, 2^228721130392 is an apocalyptic number.

It is an amenable number.

228721130392 is a deficient number, since it is larger than the sum of its proper divisors (200130989108).

228721130392 is a wasteful number, since it uses less digits than its factorization.

228721130392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28590141305 (or 28590141301 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 228721130392 in words is "two hundred twenty-eight billion, seven hundred twenty-one million, one hundred thirty thousand, three hundred ninety-two".