28730371472 has 20 divisors (see below), whose sum is σ = 60725558256. Its totient is φ = 13059259680.

The previous prime is 28730371469. The next prime is 28730371489. The reversal of 28730371472 is 27417303782.

It is a super-2 number, since 2×28730371472² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81620198 + ... + 81620549.

Almost surely, 2^28730371472 is an apocalyptic number.

28730371472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28730371472 is an abundant number, since it is smaller than the sum of its proper divisors (31995186784).

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

28730371472 is a wasteful number, since it uses less digits than its factorization.

28730371472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163240766 (or 163240760 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 28730371472 in words is "twenty-eight billion, seven hundred thirty million, three hundred seventy-one thousand, four hundred seventy-two".