28143292 has 6 divisors (see below), whose sum is σ = 49250768. Its totient is φ = 14071644.

The previous prime is 28143287. The next prime is 28143307. The reversal of 28143292 is 29234182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3517908 + ... + 3517915.

Almost surely, 2^28143292 is an apocalyptic number.

It is an amenable number.

28143292 is a deficient number, since it is larger than the sum of its proper divisors (21107476).

28143292 is a wasteful number, since it uses less digits than its factorization.

28143292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035827 (or 7035825 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 28143292 is about 5305.0251648791. The cubic root of 28143292 is about 304.1760147583.

The spelling of 28143292 in words is "twenty-eight million, one hundred forty-three thousand, two hundred ninety-two".