28440046 has 4 divisors (see below), whose sum is σ = 42660072. Its totient is φ = 14220022.

The previous prime is 28440043. The next prime is 28440053. The reversal of 28440046 is 64004482.

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

It is a junction number, because it is equal to n+sod(n) for n = 28439996 and 28440023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28440043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7110010 + ... + 7110013.

It is an arithmetic number, because the mean of its divisors is an integer number (10665018).

Almost surely, 2^28440046 is an apocalyptic number.

28440046 is a deficient number, since it is larger than the sum of its proper divisors (14220026).

28440046 is a wasteful number, since it uses less digits than its factorization.

28440046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220025.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 28440046 is about 5332.9209632246. The cubic root of 28440046 is about 305.2413962802.

The spelling of 28440046 in words is "twenty-eight million, four hundred forty thousand, forty-six".