28372487 has 8 divisors (see below), whose sum is σ = 33332880. Its totient is φ = 23808960.

The previous prime is 28372481. The next prime is 28372489. The reversal of 28372487 is 78427382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28372487 - 2²² = 24178183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372481) 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 7 ways as a sum of consecutive naturals, for example, 99062 + ... + 99347.

It is an arithmetic number, because the mean of its divisors is an integer number (4166610).

Almost surely, 2^28372487 is an apocalyptic number.

28372487 is a deficient number, since it is larger than the sum of its proper divisors (4960393).

28372487 is a wasteful number, since it uses less digits than its factorization.

28372487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198433.

The product of its digits is 150528, while the sum is 41.

The square root of 28372487 is about 5326.5830510751. The cubic root of 28372487 is about 304.9995055085. Note that the first 3 decimals are identical.

The spelling of 28372487 in words is "twenty-eight million, three hundred seventy-two thousand, four hundred eighty-seven".