28894661423 has 8 divisors (see below), whose sum is σ = 29557147536. Its totient is φ = 28236520000.

The previous prime is 28894661387. The next prime is 28894661429. The reversal of 28894661423 is 32416649882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28894661423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28894661429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072718 + ... + 1099323.

It is an arithmetic number, because the mean of its divisors is an integer number (3694643442).

Almost surely, 2^28894661423 is an apocalyptic number.

28894661423 is a deficient number, since it is larger than the sum of its proper divisors (662486113).

28894661423 is a wasteful number, since it uses less digits than its factorization.

28894661423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172345.

The product of its digits is 3981312, while the sum is 53.

The spelling of 28894661423 in words is "twenty-eight billion, eight hundred ninety-four million, six hundred sixty-one thousand, four hundred twenty-three".