28231077 has 8 divisors (see below), whose sum is σ = 43018816. Its totient is φ = 16132032.

The previous prime is 28231057. The next prime is 28231079. The reversal of 28231077 is 77013282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28231077 - 2⁶ = 28231013 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 (28231079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672148 + ... + 672189.

It is an arithmetic number, because the mean of its divisors is an integer number (5377352).

Almost surely, 2^28231077 is an apocalyptic number.

It is an amenable number.

28231077 is a deficient number, since it is larger than the sum of its proper divisors (14787739).

28231077 is a wasteful number, since it uses less digits than its factorization.

28231077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344347.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28231077 is about 5313.2924820680. The cubic root of 28231077 is about 304.4919500354.

The spelling of 28231077 in words is "twenty-eight million, two hundred thirty-one thousand, seventy-seven".