28861437 has 32 divisors (see below), whose sum is σ = 44605440. Its totient is φ = 16416000.

The previous prime is 28861381. The next prime is 28861439. The reversal of 28861437 is 73416882.

It is not a de Polignac number, because 28861437 - 2⁶ = 28861373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28861395 and 28861404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119637 + ... + 119877.

It is an arithmetic number, because the mean of its divisors is an integer number (1393920).

Almost surely, 2^28861437 is an apocalyptic number.

It is an amenable number.

28861437 is a deficient number, since it is larger than the sum of its proper divisors (15744003).

28861437 is a wasteful number, since it uses less digits than its factorization.

28861437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 64512, while the sum is 39.

The square root of 28861437 is about 5372.2841510851. The cubic root of 28861437 is about 306.7415799709.

The spelling of 28861437 in words is "twenty-eight million, eight hundred sixty-one thousand, four hundred thirty-seven".