28437842 has 8 divisors (see below), whose sum is σ = 42943500. Its totient is φ = 14123344.

The previous prime is 28437841. The next prime is 28437853. The reversal of 28437842 is 24873482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28398241 + 39601 = 5329^2 + 199^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28437796 and 28437805.

It is not an unprimeable number, because it can be changed into a prime (28437841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47417 + ... + 48012.

Almost surely, 2^28437842 is an apocalyptic number.

28437842 is a deficient number, since it is larger than the sum of its proper divisors (14505658).

28437842 is a wasteful number, since it uses less digits than its factorization.

28437842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95580.

The product of its digits is 86016, while the sum is 38.

The square root of 28437842 is about 5332.7143182436. The cubic root of 28437842 is about 305.2335110443.

The spelling of 28437842 in words is "twenty-eight million, four hundred thirty-seven thousand, eight hundred forty-two".