28924649 has 8 divisors (see below), whose sum is σ = 31375680. Its totient is φ = 26505936.

The previous prime is 28924613. The next prime is 28924657. The reversal of 28924649 is 94642982.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28924649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28924249) 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, 6197 + ... + 9810.

It is an arithmetic number, because the mean of its divisors is an integer number (3921960).

Almost surely, 2^28924649 is an apocalyptic number.

It is an amenable number.

28924649 is a deficient number, since it is larger than the sum of its proper divisors (2451031).

28924649 is a wasteful number, since it uses less digits than its factorization.

28924649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16159.

The product of its digits is 248832, while the sum is 44.

The square root of 28924649 is about 5378.1640919555. The cubic root of 28924649 is about 306.9653573503.

It can be divided in two parts, 289 and 24649, that multiplied together give a square (7123561 = 2669²).

The spelling of 28924649 in words is "twenty-eight million, nine hundred twenty-four thousand, six hundred forty-nine".