28377973 has 6 divisors (see below), whose sum is σ = 30728994. Its totient is φ = 26194896.

The previous prime is 28377971. The next prime is 28377983. The reversal of 28377973 is 37977382.

It can be written as a sum of positive squares in 3 ways, for example, as 54289 + 28323684 = 233^2 + 5322^2 .

It is not a de Polignac number, because 28377973 - 2¹ = 28377971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28377971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83790 + ... + 84127.

It is an arithmetic number, because the mean of its divisors is an integer number (5121499).

Almost surely, 2^28377973 is an apocalyptic number.

It is an amenable number.

28377973 is a deficient number, since it is larger than the sum of its proper divisors (2351021).

28377973 is a wasteful number, since it uses less digits than its factorization.

28377973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167943 (or 167930 counting only the distinct ones).

The product of its digits is 444528, while the sum is 46.

The square root of 28377973 is about 5327.0979904635. The cubic root of 28377973 is about 305.0191621034.

The spelling of 28377973 in words is "twenty-eight million, three hundred seventy-seven thousand, nine hundred seventy-three".