28949951 has 8 divisors (see below), whose sum is σ = 29289120. Its totient is φ = 28613088.

The previous prime is 28949927. The next prime is 28949953. The reversal of 28949951 is 15994982.

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

It is a cyclic number.

It is not a de Polignac number, because 28949951 - 2⁶ = 28949887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28949896 and 28949905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28949953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37865 + ... + 38621.

It is an arithmetic number, because the mean of its divisors is an integer number (3661140).

Almost surely, 2^28949951 is an apocalyptic number.

28949951 is a deficient number, since it is larger than the sum of its proper divisors (339169).

28949951 is a wasteful number, since it uses less digits than its factorization.

28949951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its digits is 233280, while the sum is 47.

The square root of 28949951 is about 5380.5158674610. The cubic root of 28949951 is about 307.0548378240.

The spelling of 28949951 in words is "twenty-eight million, nine hundred forty-nine thousand, nine hundred fifty-one".