28722970 has 32 divisors (see below), whose sum is σ = 53265600. Its totient is φ = 11147136.

The previous prime is 28722949. The next prime is 28722983. The reversal of 28722970 is 7922782.

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 15 ways as a sum of consecutive naturals, for example, 52237 + ... + 52783.

It is an arithmetic number, because the mean of its divisors is an integer number (1664550).

Almost surely, 2^28722970 is an apocalyptic number.

28722970 is a deficient number, since it is larger than the sum of its proper divisors (24542630).

28722970 is a wasteful number, since it uses less digits than its factorization.

28722970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28722970 is about 5359.3814941652. The cubic root of 28722970 is about 306.2502473967.

It can be divided in two parts, 28722 and 970, that added together give a palindrome (29692).

The spelling of 28722970 in words is "twenty-eight million, seven hundred twenty-two thousand, nine hundred seventy".