28723347 has 12 divisors (see below), whose sum is σ = 41598960. Its totient is φ = 19098288.

The previous prime is 28723337. The next prime is 28723351. The reversal of 28723347 is 74332782.

It is not a de Polignac number, because 28723347 - 2²⁰ = 27674771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28723327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447 + ... + 7592.

It is an arithmetic number, because the mean of its divisors is an integer number (3466580).

Almost surely, 2^28723347 is an apocalyptic number.

28723347 is a deficient number, since it is larger than the sum of its proper divisors (12875613).

28723347 is a wasteful number, since it uses less digits than its factorization.

28723347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442 (or 8439 counting only the distinct ones).

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

The square root of 28723347 is about 5359.4166660188. The cubic root of 28723347 is about 306.2515872748.

The spelling of 28723347 in words is "twenty-eight million, seven hundred twenty-three thousand, three hundred forty-seven".