28144434 has 32 divisors (see below), whose sum is σ = 59535360. Its totient is φ = 8845200.

The previous prime is 28144429. The next prime is 28144451. The reversal of 28144434 is 43444182.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30439 + ... + 31349.

It is an arithmetic number, because the mean of its divisors is an integer number (1860480).

Almost surely, 2^28144434 is an apocalyptic number.

28144434 is an abundant number, since it is smaller than the sum of its proper divisors (31390926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28144434 is a wasteful number, since it uses less digits than its factorization.

28144434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 12288, while the sum is 30.

The square root of 28144434 is about 5305.1327975839. The cubic root of 28144434 is about 304.1801289928.

The spelling of 28144434 in words is "twenty-eight million, one hundred forty-four thousand, four hundred thirty-four".