28438814 has 4 divisors (see below), whose sum is σ = 42658224. Its totient is φ = 14219406.

The previous prime is 28438799. The next prime is 28438831. The reversal of 28438814 is 41883482.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28438814² = 1617532283453192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7109702 + ... + 7109705.

It is an arithmetic number, because the mean of its divisors is an integer number (10664556).

Almost surely, 2^28438814 is an apocalyptic number.

28438814 is a deficient number, since it is larger than the sum of its proper divisors (14219410).

28438814 is a wasteful number, since it uses less digits than its factorization.

28438814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14219409.

The product of its digits is 49152, while the sum is 38.

The square root of 28438814 is about 5332.8054530425. The cubic root of 28438814 is about 305.2369886124.

The spelling of 28438814 in words is "twenty-eight million, four hundred thirty-eight thousand, eight hundred fourteen".