28772343 has 6 divisors (see below), whose sum is σ = 41560064. Its totient is φ = 19181556.

The previous prime is 28772339. The next prime is 28772351. The reversal of 28772343 is 34327782.

It is not a de Polignac number, because 28772343 - 2² = 28772339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28772298 and 28772307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28772323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1598455 + ... + 1598472.

Almost surely, 2^28772343 is an apocalyptic number.

28772343 is a deficient number, since it is larger than the sum of its proper divisors (12787721).

28772343 is a wasteful number, since it uses less digits than its factorization.

28772343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196933 (or 3196930 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 28772343 is about 5363.9857382361. The cubic root of 28772343 is about 306.4256219953.

The spelling of 28772343 in words is "twenty-eight million, seven hundred seventy-two thousand, three hundred forty-three".