28535740 has 24 divisors (see below), whose sum is σ = 60041520. Its totient is φ = 11392128.

The previous prime is 28535737. The next prime is 28535807. The reversal of 28535740 is 4753582.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28535696 and 28535705.

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, 12616 + ... + 14704.

It is an arithmetic number, because the mean of its divisors is an integer number (2501730).

Almost surely, 2^28535740 is an apocalyptic number.

28535740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28535740 is an abundant number, since it is smaller than the sum of its proper divisors (31505780).

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

28535740 is a wasteful number, since it uses less digits than its factorization.

28535740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28535740 is about 5341.8854349377. The cubic root of 28535740 is about 305.5833679489.

The spelling of 28535740 in words is "twenty-eight million, five hundred thirty-five thousand, seven hundred forty".