28374747731 has 6 divisors (see below), whose sum is σ = 30954879732. Its totient is φ = 25794717320.

The previous prime is 28374747721. The next prime is 28374747749. The reversal of 28374747731 is 13774747382.

It is not a de Polignac number, because 28374747731 - 2¹⁰ = 28374746707 is a prime.

It is a super-2 number, since 2×28374747731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28374747721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 533285 + ... + 584073.

It is an arithmetic number, because the mean of its divisors is an integer number (5159146622).

Almost surely, 2^28374747731 is an apocalyptic number.

28374747731 is a deficient number, since it is larger than the sum of its proper divisors (2580132001).

28374747731 is an frugal number, since it uses more digits than its factorization.

28374747731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101589 (or 50800 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 53.

The spelling of 28374747731 in words is "twenty-eight billion, three hundred seventy-four million, seven hundred forty-seven thousand, seven hundred thirty-one".