28249038680 has 16 divisors (see below), whose sum is σ = 63560337120. Its totient is φ = 11299615456.

The previous prime is 28249038677. The next prime is 28249038683. The reversal of 28249038680 is 8683094282.

It is an interprime number because it is at equal distance from previous prime (28249038677) and next prime (28249038683).

It is a super-2 number, since 2×28249038680² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28249038683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353112944 + ... + 353113023.

It is an arithmetic number, because the mean of its divisors is an integer number (3972521070).

Almost surely, 2^28249038680 is an apocalyptic number.

28249038680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28249038680 is an abundant number, since it is smaller than the sum of its proper divisors (35311298440).

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

28249038680 is a wasteful number, since it uses less digits than its factorization.

28249038680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706225978 (or 706225974 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 28249038680 in words is "twenty-eight billion, two hundred forty-nine million, thirty-eight thousand, six hundred eighty".