28763425 has 6 divisors (see below), whose sum is σ = 35666678. Its totient is φ = 23010720.

The previous prime is 28763417. The next prime is 28763453. The reversal of 28763425 is 52436782.

It can be written as a sum of positive squares in 3 ways, for example, as 23104 + 28740321 = 152^2 + 5361^2 .

It is not a de Polignac number, because 28763425 - 2³ = 28763417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575244 + ... + 575293.

Almost surely, 2^28763425 is an apocalyptic number.

28763425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28763425 is a deficient number, since it is larger than the sum of its proper divisors (6903253).

28763425 is a wasteful number, since it uses less digits than its factorization.

28763425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150547 (or 1150542 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 28763425 is about 5363.1543889767. The cubic root of 28763425 is about 306.3939598063.

The spelling of 28763425 in words is "twenty-eight million, seven hundred sixty-three thousand, four hundred twenty-five".