28081237480 has 32 divisors (see below), whose sum is σ = 63198836640. Its totient is φ = 11229641280.

The previous prime is 28081237463. The next prime is 28081237543. The reversal of 28081237480 is 8473218082.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 73915 + ... + 248245.

It is an arithmetic number, because the mean of its divisors is an integer number (1974963645).

Almost surely, 2^28081237480 is an apocalyptic number.

28081237480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28081237480 is an abundant number, since it is smaller than the sum of its proper divisors (35117599160).

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

28081237480 is a wasteful number, since it uses less digits than its factorization.

28081237480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178369 (or 178365 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 28081237480 in words is "twenty-eight billion, eighty-one million, two hundred thirty-seven thousand, four hundred eighty".