28353020143 has 18 divisors (see below), whose sum is σ = 33498759672. Its totient is φ = 23507178480.

The previous prime is 28353020119. The next prime is 28353020153. The reversal of 28353020143 is 34102035382.

It is not a de Polignac number, because 28353020143 - 2²¹ = 28350922991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28353020153) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13809505 + ... + 13811557.

It is an arithmetic number, because the mean of its divisors is an integer number (1861042204).

Almost surely, 2^28353020143 is an apocalyptic number.

28353020143 is a deficient number, since it is larger than the sum of its proper divisors (5145739529).

28353020143 is an frugal number, since it uses more digits than its factorization.

28353020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175 (or 2091 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 28353020143 in words is "twenty-eight billion, three hundred fifty-three million, twenty thousand, one hundred forty-three".