28036540 has 48 divisors (see below), whose sum is σ = 70221312. Its totient is φ = 9193536.

The previous prime is 28036529. The next prime is 28036549. The reversal of 28036540 is 4563082.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 28036499 and 28036508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28036549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1134 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (1462944).

Almost surely, 2^28036540 is an apocalyptic number.

28036540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28036540 is an abundant number, since it is smaller than the sum of its proper divisors (42184772).

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

28036540 is a wasteful number, since it uses less digits than its factorization.

28036540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8746 (or 8744 counting only the distinct ones).

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

The square root of 28036540 is about 5294.9542018794. The cubic root of 28036540 is about 303.7909313896.

The spelling of 28036540 in words is "twenty-eight million, thirty-six thousand, five hundred forty".