28732722 has 32 divisors (see below), whose sum is σ = 59719680. Its totient is φ = 9206160.

The previous prime is 28732709. The next prime is 28732741. The reversal of 28732722 is 22723782.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32863 + ... + 33725.

It is an arithmetic number, because the mean of its divisors is an integer number (1866240).

Almost surely, 2^28732722 is an apocalyptic number.

28732722 is an abundant number, since it is smaller than the sum of its proper divisors (30986958).

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

28732722 is a wasteful number, since it uses less digits than its factorization.

28732722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its digits is 18816, while the sum is 33.

The square root of 28732722 is about 5360.2912234318. The cubic root of 28732722 is about 306.2849027554.

The spelling of 28732722 in words is "twenty-eight million, seven hundred thirty-two thousand, seven hundred twenty-two".