28577740 has 12 divisors (see below), whose sum is σ = 60013296. Its totient is φ = 11431088.

The previous prime is 28577723. The next prime is 28577761. The reversal of 28577740 is 4777582.

It is a junction number, because it is equal to n+sod(n) for n = 28577693 and 28577702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714424 + ... + 714463.

It is an arithmetic number, because the mean of its divisors is an integer number (5001108).

Almost surely, 2^28577740 is an apocalyptic number.

28577740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28577740 is an abundant number, since it is smaller than the sum of its proper divisors (31435556).

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

28577740 is a wasteful number, since it uses less digits than its factorization.

28577740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428896 (or 1428894 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 28577740 is about 5345.8151857317. The cubic root of 28577740 is about 305.7332175741.

The spelling of 28577740 in words is "twenty-eight million, five hundred seventy-seven thousand, seven hundred forty".