28149465 has 8 divisors (see below), whose sum is σ = 45039168. Its totient is φ = 15013040.

The previous prime is 28149463. The next prime is 28149479. The reversal of 28149465 is 56494182.

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

It is not a de Polignac number, because 28149465 - 2¹ = 28149463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28149463) 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, 938301 + ... + 938330.

It is an arithmetic number, because the mean of its divisors is an integer number (5629896).

Almost surely, 2^28149465 is an apocalyptic number.

It is an amenable number.

28149465 is a deficient number, since it is larger than the sum of its proper divisors (16889703).

28149465 is a wasteful number, since it uses less digits than its factorization.

28149465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876639.

The product of its digits is 69120, while the sum is 39.

The square root of 28149465 is about 5305.6069398326. The cubic root of 28149465 is about 304.1982526361.

The spelling of 28149465 in words is "twenty-eight million, one hundred forty-nine thousand, four hundred sixty-five".