28010391275 has 48 divisors (see below), whose sum is σ = 37738522080. Its totient is φ = 20540006400.

The previous prime is 28010391271. The next prime is 28010391281. The reversal of 28010391275 is 57219301082.

It is not a de Polignac number, because 28010391275 - 2² = 28010391271 is a prime.

It is a super-2 number, since 2×28010391275² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28010391271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14095832 + ... + 14097818.

It is an arithmetic number, because the mean of its divisors is an integer number (786219210).

Almost surely, 2^28010391275 is an apocalyptic number.

28010391275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28010391275 is a deficient number, since it is larger than the sum of its proper divisors (9728130805).

28010391275 is a wasteful number, since it uses less digits than its factorization.

28010391275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864 (or 2859 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 28010391275 in words is "twenty-eight billion, ten million, three hundred ninety-one thousand, two hundred seventy-five".