28743031 has 8 divisors (see below), whose sum is σ = 31027680. Its totient is φ = 26544672.

The previous prime is 28742977. The next prime is 28743037. The reversal of 28743031 is 13034782.

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-28743031 is a prime.

It is a super-2 number, since 2×28743031² = 1652323662133922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28743037) 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, 20880 + ... + 22213.

It is an arithmetic number, because the mean of its divisors is an integer number (3878460).

Almost surely, 2^28743031 is an apocalyptic number.

28743031 is a deficient number, since it is larger than the sum of its proper divisors (2284649).

28743031 is a wasteful number, since it uses less digits than its factorization.

28743031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43145.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28743031 is about 5361.2527453945. The cubic root of 28743031 is about 306.3215289814.

The spelling of 28743031 in words is "twenty-eight million, seven hundred forty-three thousand, thirty-one".