28311743 has 8 divisors (see below), whose sum is σ = 29376000. Its totient is φ = 27253408.

The previous prime is 28311737. The next prime is 28311757. The reversal of 28311743 is 34711382.

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

It is a cyclic number.

It is not a de Polignac number, because 28311743 - 2⁴ = 28311727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28310743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9833 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (3672000).

Almost surely, 2^28311743 is an apocalyptic number.

28311743 is a deficient number, since it is larger than the sum of its proper divisors (1064257).

28311743 is a wasteful number, since it uses less digits than its factorization.

28311743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its digits is 4032, while the sum is 29.

The square root of 28311743 is about 5320.8780290475. The cubic root of 28311743 is about 304.7816873641.

The spelling of 28311743 in words is "twenty-eight million, three hundred eleven thousand, seven hundred forty-three".