28202649 has 8 divisors (see below), whose sum is σ = 38241120. Its totient is φ = 18482976.

The previous prime is 28202641. The next prime is 28202651. The reversal of 28202649 is 94620282.

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

It is not a de Polignac number, because 28202649 - 2³ = 28202641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28202641) 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, 79492 + ... + 79845.

It is an arithmetic number, because the mean of its divisors is an integer number (4780140).

Almost surely, 2^28202649 is an apocalyptic number.

It is an amenable number.

28202649 is a deficient number, since it is larger than the sum of its proper divisors (10038471).

28202649 is a wasteful number, since it uses less digits than its factorization.

28202649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159399.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 28202649 is about 5310.6166308631. The cubic root of 28202649 is about 304.3897104092.

The spelling of 28202649 in words is "twenty-eight million, two hundred two thousand, six hundred forty-nine".