28406324 has 12 divisors (see below), whose sum is σ = 50028804. Its totient is φ = 14112384.

The previous prime is 28406309. The next prime is 28406327. The reversal of 28406324 is 42360482.

It can be written as a sum of positive squares in 2 ways, for example, as 19891600 + 8514724 = 4460^2 + 2918^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28406327) 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, 21989 + ... + 23244.

It is an arithmetic number, because the mean of its divisors is an integer number (4169067).

Almost surely, 2^28406324 is an apocalyptic number.

It is an amenable number.

28406324 is a deficient number, since it is larger than the sum of its proper divisors (21622480).

28406324 is a wasteful number, since it uses less digits than its factorization.

28406324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45394 (or 45392 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 28406324 is about 5329.7583434899. The cubic root of 28406324 is about 305.1207047103.

The spelling of 28406324 in words is "twenty-eight million, four hundred six thousand, three hundred twenty-four".