28031773 has 24 divisors (see below), whose sum is σ = 35934624. Its totient is φ = 21621600.

The previous prime is 28031771. The next prime is 28031803. The reversal of 28031773 is 37713082.

It is not a de Polignac number, because 28031773 - 2¹ = 28031771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28031771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70411 + ... + 70807.

It is an arithmetic number, because the mean of its divisors is an integer number (1497276).

Almost surely, 2^28031773 is an apocalyptic number.

It is an amenable number.

28031773 is a deficient number, since it is larger than the sum of its proper divisors (7902851).

28031773 is a wasteful number, since it uses less digits than its factorization.

28031773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 28031773 is about 5294.5040372069. The cubic root of 28031773 is about 303.7737127474.

The spelling of 28031773 in words is "twenty-eight million, thirty-one thousand, seven hundred seventy-three".