28457346 has 8 divisors (see below), whose sum is σ = 56914704. Its totient is φ = 9485780.

The previous prime is 28457339. The next prime is 28457347. The reversal of 28457346 is 64375482.

It is a happy number.

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

28457346 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28457347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2371440 + ... + 2371451.

It is an arithmetic number, because the mean of its divisors is an integer number (7114338).

Almost surely, 2^28457346 is an apocalyptic number.

28457346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28457346 is a wasteful number, since it uses less digits than its factorization.

28457346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742896.

The product of its digits is 161280, while the sum is 39.

The square root of 28457346 is about 5334.5427170471. The cubic root of 28457346 is about 305.3032762291.

It can be divided in two parts, 284 and 57346, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 28457346 in words is "twenty-eight million, four hundred fifty-seven thousand, three hundred forty-six".