28142640454 has 8 divisors (see below), whose sum is σ = 42929451720. Its totient is φ = 13832823216.

The previous prime is 28142640443. The next prime is 28142640499. The reversal of 28142640454 is 45404624182.

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

It is a super-2 number, since 2×28142640454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119248359 + ... + 119248594.

It is an arithmetic number, because the mean of its divisors is an integer number (5366181465).

Almost surely, 2^28142640454 is an apocalyptic number.

28142640454 is a deficient number, since it is larger than the sum of its proper divisors (14786811266).

28142640454 is a wasteful number, since it uses less digits than its factorization.

28142640454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238497014.

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 28142640454 in words is "twenty-eight billion, one hundred forty-two million, six hundred forty thousand, four hundred fifty-four".