28192540 has 24 divisors (see below), whose sum is σ = 59314752. Its totient is φ = 11256000.

The previous prime is 28192537. The next prime is 28192583. The reversal of 28192540 is 4529182.

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, 14082 + ... + 15958.

It is an arithmetic number, because the mean of its divisors is an integer number (2471448).

Almost surely, 2^28192540 is an apocalyptic number.

28192540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28192540 is an abundant number, since it is smaller than the sum of its proper divisors (31122212).

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

28192540 is a wasteful number, since it uses less digits than its factorization.

28192540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 28192540 is about 5309.6647728458. The cubic root of 28192540 is about 304.3533374276.

The spelling of 28192540 in words is "twenty-eight million, one hundred ninety-two thousand, five hundred forty".