28649319 has 8 divisors (see below), whose sum is σ = 38420592. Its totient is φ = 18988800.

The previous prime is 28649317. The next prime is 28649323. The reversal of 28649319 is 91394682.

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

It is not a de Polignac number, because 28649319 - 2¹ = 28649317 is a prime.

It is a super-2 number, since 2×28649319² = 1641566958327522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649311) 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, 27082 + ... + 28119.

It is an arithmetic number, because the mean of its divisors is an integer number (4802574).

Almost surely, 2^28649319 is an apocalyptic number.

28649319 is a deficient number, since it is larger than the sum of its proper divisors (9771273).

28649319 is a wasteful number, since it uses less digits than its factorization.

28649319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55377.

The product of its digits is 93312, while the sum is 42.

The square root of 28649319 is about 5352.5058617436. The cubic root of 28649319 is about 305.9882626110.

The spelling of 28649319 in words is "twenty-eight million, six hundred forty-nine thousand, three hundred nineteen".