28491346 has 8 divisors (see below), whose sum is σ = 46024524. Its totient is φ = 13149840.

The previous prime is 28491343. The next prime is 28491347. The reversal of 28491346 is 64319482.

It can be written as a sum of positive squares in 2 ways, for example, as 23629321 + 4862025 = 4861^2 + 2205^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28491341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547885 + ... + 547936.

Almost surely, 2^28491346 is an apocalyptic number.

28491346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28491346 is a deficient number, since it is larger than the sum of its proper divisors (17533178).

28491346 is a wasteful number, since it uses less digits than its factorization.

28491346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095836.

The product of its digits is 41472, while the sum is 37.

The square root of 28491346 is about 5337.7285431164. The cubic root of 28491346 is about 305.4248169624.

The spelling of 28491346 in words is "twenty-eight million, four hundred ninety-one thousand, three hundred forty-six".