28411645431 has 16 divisors (see below), whose sum is σ = 40842775904. Its totient is φ = 17464132224.

The previous prime is 28411645411. The next prime is 28411645469. The reversal of 28411645431 is 13454611482.

It is not a de Polignac number, because 28411645431 - 2¹⁴ = 28411629047 is a prime.

It is a super-2 number, since 2×28411645431² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28411645431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28411645411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381136 + ... + 449541.

It is an arithmetic number, because the mean of its divisors is an integer number (2552673494).

Almost surely, 2^28411645431 is an apocalyptic number.

28411645431 is a deficient number, since it is larger than the sum of its proper divisors (12431130473).

28411645431 is a wasteful number, since it uses less digits than its factorization.

28411645431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831570.

The product of its digits is 92160, while the sum is 39.

The spelling of 28411645431 in words is "twenty-eight billion, four hundred eleven million, six hundred forty-five thousand, four hundred thirty-one".