28426540 has 24 divisors (see below), whose sum is σ = 60967872. Its totient is φ = 11128320.

The previous prime is 28426523. The next prime is 28426547. The reversal of 28426540 is 4562482.

It is not an unprimeable number, because it can be changed into a prime (28426547) 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, 14181 + ... + 16060.

It is an arithmetic number, because the mean of its divisors is an integer number (2540328).

Almost surely, 2^28426540 is an apocalyptic number.

28426540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28426540 is an abundant number, since it is smaller than the sum of its proper divisors (32541332).

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

28426540 is a wasteful number, since it uses less digits than its factorization.

28426540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30297 (or 30295 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 28426540 is about 5331.6545274427. The cubic root of 28426540 is about 305.1930695526.

The spelling of 28426540 in words is "twenty-eight million, four hundred twenty-six thousand, five hundred forty".