28337481 has 6 divisors (see below), whose sum is σ = 40931930. Its totient is φ = 18891648.

The previous prime is 28337431. The next prime is 28337497. The reversal of 28337481 is 18473382.

28337481 is a `hidden beast` number, since 283 + 374 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 1245456 = 5205^2 + 1116^2 .

It is not a de Polignac number, because 28337481 - 2¹⁰ = 28336457 is a prime.

It is a super-2 number, since 2×28337481² = 1606025658850722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28337411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1574296 + ... + 1574313.

Almost surely, 2^28337481 is an apocalyptic number.

It is an amenable number.

28337481 is a deficient number, since it is larger than the sum of its proper divisors (12594449).

28337481 is a wasteful number, since it uses less digits than its factorization.

28337481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148615 (or 3148612 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28337481 is about 5323.2960654091. The cubic root of 28337481 is about 304.8740176638.

The spelling of 28337481 in words is "twenty-eight million, three hundred thirty-seven thousand, four hundred eighty-one".