28346221740 has 24 divisors (see below), whose sum is σ = 79369421040. Its totient is φ = 7558992448.

The previous prime is 28346221721. The next prime is 28346221759. The reversal of 28346221740 is 4712264382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28346221721) and next prime (28346221759).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236218455 + ... + 236218574.

It is an arithmetic number, because the mean of its divisors is an integer number (3307059210).

Almost surely, 2^28346221740 is an apocalyptic number.

28346221740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28346221740 is an abundant number, since it is smaller than the sum of its proper divisors (51023199300).

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

28346221740 is a wasteful number, since it uses less digits than its factorization.

28346221740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472437041 (or 472437039 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 28346221740 in words is "twenty-eight billion, three hundred forty-six million, two hundred twenty-one thousand, seven hundred forty".