28406064 has 40 divisors (see below), whose sum is σ = 77247040. Its totient is φ = 8970048.

The previous prime is 28406029. The next prime is 28406069. The reversal of 28406064 is 46060482.

It is not an unprimeable number, because it can be changed into a prime (28406069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14662 + ... + 16485.

It is an arithmetic number, because the mean of its divisors is an integer number (1931176).

Almost surely, 2^28406064 is an apocalyptic number.

28406064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28406064 is an abundant number, since it is smaller than the sum of its proper divisors (48840976).

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

28406064 is a wasteful number, since it uses less digits than its factorization.

28406064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31177 (or 31171 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28406064 is about 5329.7339520843. The cubic root of 28406064 is about 305.1197737953.

The spelling of 28406064 in words is "twenty-eight million, four hundred six thousand, sixty-four".