28481437 has 16 divisors (see below), whose sum is σ = 31173120. Its totient is φ = 25930800.

The previous prime is 28481407. The next prime is 28481459. The reversal of 28481437 is 73418482.

It is a cyclic number.

It is not a de Polignac number, because 28481437 - 2⁷ = 28481309 is a prime.

It is a super-2 number, since 2×28481437² = 1622384507169938, 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 = 28481396 and 28481405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57762 + ... + 58252.

It is an arithmetic number, because the mean of its divisors is an integer number (1948320).

Almost surely, 2^28481437 is an apocalyptic number.

It is an amenable number.

28481437 is a deficient number, since it is larger than the sum of its proper divisors (2691683).

28481437 is a wasteful number, since it uses less digits than its factorization.

28481437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its digits is 43008, while the sum is 37.

The square root of 28481437 is about 5336.8002585819. The cubic root of 28481437 is about 305.3894049764.

The spelling of 28481437 in words is "twenty-eight million, four hundred eighty-one thousand, four hundred thirty-seven".