28356040 has 32 divisors (see below), whose sum is σ = 65162880. Its totient is φ = 11100352.

The previous prime is 28356019. The next prime is 28356043. The reversal of 28356040 is 4065382.

It is not an unprimeable number, because it can be changed into a prime (28356043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5662 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (2036340).

Almost surely, 2^28356040 is an apocalyptic number.

28356040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28356040 is an abundant number, since it is smaller than the sum of its proper divisors (36806840).

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

28356040 is a wasteful number, since it uses less digits than its factorization.

28356040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15141 (or 15137 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28356040 is about 5325.0389669936. The cubic root of 28356040 is about 304.9405599477.

The spelling of 28356040 in words is "twenty-eight million, three hundred fifty-six thousand, forty".