28350540 has 48 divisors (see below), whose sum is σ = 88203360. Its totient is φ = 7560000.

The previous prime is 28350521. The next prime is 28350563. The reversal of 28350540 is 4505382.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25711 + ... + 26790.

It is an arithmetic number, because the mean of its divisors is an integer number (1837570).

Almost surely, 2^28350540 is an apocalyptic number.

28350540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28350540 is an abundant number, since it is smaller than the sum of its proper divisors (59852820).

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

28350540 is a wasteful number, since it uses less digits than its factorization.

28350540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52519 (or 52511 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28350540 is about 5324.5225138035. The cubic root of 28350540 is about 304.9208430252.

The spelling of 28350540 in words is "twenty-eight million, three hundred fifty thousand, five hundred forty".