28463540 has 24 divisors (see below), whose sum is σ = 68312832. Its totient is φ = 9758880.

The previous prime is 28463507. The next prime is 28463551. The reversal of 28463540 is 4536482.

It is a junction number, because it is equal to n+sod(n) for n = 28463497 and 28463506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101516 + ... + 101795.

It is an arithmetic number, because the mean of its divisors is an integer number (2846368).

Almost surely, 2^28463540 is an apocalyptic number.

28463540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28463540 is an abundant number, since it is smaller than the sum of its proper divisors (39849292).

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

28463540 is a wasteful number, since it uses less digits than its factorization.

28463540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203327 (or 203325 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28463540 is about 5335.1232413132. The cubic root of 28463540 is about 305.3254252998.

The spelling of 28463540 in words is "twenty-eight million, four hundred sixty-three thousand, five hundred forty".