28729072 has 40 divisors (see below), whose sum is σ = 57090096. Its totient is φ = 14002176.

The previous prime is 28729049. The next prime is 28729073. The reversal of 28729072 is 27092782.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28729073) 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, 165978 + ... + 166150.

Almost surely, 2^28729072 is an apocalyptic number.

It is an amenable number.

28729072 is a deficient number, since it is larger than the sum of its proper divisors (28361024).

28729072 is a wasteful number, since it uses less digits than its factorization.

28729072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 379 counting only the distinct ones).

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

The square root of 28729072 is about 5359.9507460424. The cubic root of 28729072 is about 306.2719327899.

The spelling of 28729072 in words is "twenty-eight million, seven hundred twenty-nine thousand, seventy-two".