28571516 has 24 divisors (see below), whose sum is σ = 53130000. Its totient is φ = 13405824.

The previous prime is 28571507. The next prime is 28571519. The reversal of 28571516 is 61517582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6560 + ... + 10008.

It is an arithmetic number, because the mean of its divisors is an integer number (2213750).

Almost surely, 2^28571516 is an apocalyptic number.

It is an amenable number.

28571516 is a deficient number, since it is larger than the sum of its proper divisors (24558484).

28571516 is a wasteful number, since it uses less digits than its factorization.

28571516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its digits is 16800, while the sum is 35.

The square root of 28571516 is about 5345.2330164362. The cubic root of 28571516 is about 305.7110205575.

The spelling of 28571516 in words is "twenty-eight million, five hundred seventy-one thousand, five hundred sixteen".