28970722 has 24 divisors (see below), whose sum is σ = 48241872. Its totient is φ = 12940200.

The previous prime is 28970717. The next prime is 28970729. The reversal of 28970722 is 22707982.

It is not an unprimeable number, because it can be changed into a prime (28970729) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 137197 + ... + 137407.

It is an arithmetic number, because the mean of its divisors is an integer number (2010078).

Almost surely, 2^28970722 is an apocalyptic number.

28970722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28970722 is a deficient number, since it is larger than the sum of its proper divisors (19271150).

28970722 is a wasteful number, since it uses less digits than its factorization.

28970722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 303 counting only the distinct ones).

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

The square root of 28970722 is about 5382.4457266191. The cubic root of 28970722 is about 307.1282554649.

It can be divided in two parts, 28970 and 722, that added together give a palindrome (29692).

The spelling of 28970722 in words is "twenty-eight million, nine hundred seventy thousand, seven hundred twenty-two".