28972045 has 8 divisors (see below), whose sum is σ = 34961760. Its totient is φ = 23047440.

The previous prime is 28972043. The next prime is 28972049. The reversal of 28972045 is 54027982.

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

It is not a de Polignac number, because 28972045 - 2¹ = 28972043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28971995 and 28972013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28972043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15291 + ... + 17080.

It is an arithmetic number, because the mean of its divisors is an integer number (4370220).

Almost surely, 2^28972045 is an apocalyptic number.

It is an amenable number.

28972045 is a deficient number, since it is larger than the sum of its proper divisors (5989715).

28972045 is a wasteful number, since it uses less digits than its factorization.

28972045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32555.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28972045 is about 5382.5686247367. The cubic root of 28972045 is about 307.1329305813.

The spelling of 28972045 in words is "twenty-eight million, nine hundred seventy-two thousand, forty-five".