28737123423 has 4 divisors (see below), whose sum is σ = 38316164568. Its totient is φ = 19158082280.

The previous prime is 28737123413. The next prime is 28737123433. The reversal of 28737123423 is 32432173782.

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

It is an interprime number because it is at equal distance from previous prime (28737123413) and next prime (28737123433).

It is a cyclic number.

It is not a de Polignac number, because 28737123423 - 2¹⁰ = 28737122399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28737123413) 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, 4789520568 + ... + 4789520573.

It is an arithmetic number, because the mean of its divisors is an integer number (9579041142).

Almost surely, 2^28737123423 is an apocalyptic number.

28737123423 is a deficient number, since it is larger than the sum of its proper divisors (9579041145).

28737123423 is an equidigital number, since it uses as much as digits as its factorization.

28737123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579041144.

The product of its digits is 338688, while the sum is 42.

The spelling of 28737123423 in words is "twenty-eight billion, seven hundred thirty-seven million, one hundred twenty-three thousand, four hundred twenty-three".