28437434 has 8 divisors (see below), whose sum is σ = 42686868. Its totient is φ = 14208480.

The previous prime is 28437427. The next prime is 28437443. The reversal of 28437434 is 43473482.

It can be written as a sum of positive squares in 2 ways, for example, as 22420225 + 6017209 = 4735^2 + 2453^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28437394 and 28437403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977 + ... + 7604.

Almost surely, 2^28437434 is an apocalyptic number.

28437434 is a deficient number, since it is larger than the sum of its proper divisors (14249434).

28437434 is a wasteful number, since it uses less digits than its factorization.

28437434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240.

The product of its digits is 64512, while the sum is 35.

The square root of 28437434 is about 5332.6760636663. The cubic root of 28437434 is about 305.2320513008.

The spelling of 28437434 in words is "twenty-eight million, four hundred thirty-seven thousand, four hundred thirty-four".