28860620831 has 4 divisors (see below), whose sum is σ = 32983566672. Its totient is φ = 24737674992.

The previous prime is 28860620827. The next prime is 28860620879. The reversal of 28860620831 is 13802606882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28860620831 - 2² = 28860620827 is a prime.

It is a super-2 number, since 2×28860620831² (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 (28860620801) 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, 2061472910 + ... + 2061472923.

It is an arithmetic number, because the mean of its divisors is an integer number (8245891668).

Almost surely, 2^28860620831 is an apocalyptic number.

28860620831 is a deficient number, since it is larger than the sum of its proper divisors (4122945841).

28860620831 is an equidigital number, since it uses as much as digits as its factorization.

28860620831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122945840.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 28860620831 in words is "twenty-eight billion, eight hundred sixty million, six hundred twenty thousand, eight hundred thirty-one".