28667434 has 8 divisors (see below), whose sum is σ = 43484580. Its totient is φ = 14172576.

The previous prime is 28667417. The next prime is 28667437. The reversal of 28667434 is 43476682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 205209 = 5335^2 + 453^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28667437) 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, 80349 + ... + 80704.

Almost surely, 2^28667434 is an apocalyptic number.

28667434 is a deficient number, since it is larger than the sum of its proper divisors (14817146).

28667434 is a wasteful number, since it uses less digits than its factorization.

28667434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161144.

The product of its digits is 193536, while the sum is 40.

The square root of 28667434 is about 5354.1977923868. The cubic root of 28667434 is about 306.0527412758.

The spelling of 28667434 in words is "twenty-eight million, six hundred sixty-seven thousand, four hundred thirty-four".