28603431 has 6 divisors (see below), whose sum is σ = 41316080. Its totient is φ = 19068948.

The previous prime is 28603429. The next prime is 28603441. The reversal of 28603431 is 13430682.

It is a happy number.

28603431 is a `hidden beast` number, since 28 + 603 + 4 + 31 = 666.

It is not a de Polignac number, because 28603431 - 2¹ = 28603429 is a prime.

It is a super-2 number, since 2×28603431² = 1636312529943522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28603395 and 28603404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28603441) by changing a digit.

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, 1589071 + ... + 1589088.

Almost surely, 2^28603431 is an apocalyptic number.

28603431 is a deficient number, since it is larger than the sum of its proper divisors (12712649).

28603431 is a wasteful number, since it uses less digits than its factorization.

28603431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178165 (or 3178162 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28603431 is about 5348.2175535406. The cubic root of 28603431 is about 305.8248068034.

The spelling of 28603431 in words is "twenty-eight million, six hundred three thousand, four hundred thirty-one".