28722782 has 8 divisors (see below), whose sum is σ = 47000952. Its totient is φ = 13055800.

The previous prime is 28722769. The next prime is 28722803.

28722782 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652769 + ... + 652812.

It is an arithmetic number, because the mean of its divisors is an integer number (5875119).

Almost surely, 2^28722782 is an apocalyptic number.

28722782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28722782 is a deficient number, since it is larger than the sum of its proper divisors (18278170).

28722782 is a wasteful number, since it uses less digits than its factorization.

28722782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305594.

The product of its digits is 50176, while the sum is 38.

The square root of 28722782 is about 5359.3639547991. The cubic root of 28722782 is about 306.2495792303.

The spelling of 28722782 in words is "twenty-eight million, seven hundred twenty-two thousand, seven hundred eighty-two".