28661146 has 8 divisors (see below), whose sum is σ = 43021440. Its totient is φ = 14320668.

The previous prime is 28661137. The next prime is 28661153. The reversal of 28661146 is 64116682.

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

It is a super-2 number, since 2×28661146² = 1642922580066632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556 + ... + 7591.

It is an arithmetic number, because the mean of its divisors is an integer number (5377680).

Almost surely, 2^28661146 is an apocalyptic number.

28661146 is a deficient number, since it is larger than the sum of its proper divisors (14360294).

28661146 is a wasteful number, since it uses less digits than its factorization.

28661146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9908.

The product of its digits is 13824, while the sum is 34.

The square root of 28661146 is about 5353.6105573715. The cubic root of 28661146 is about 306.0303628009.

The spelling of 28661146 in words is "twenty-eight million, six hundred sixty-one thousand, one hundred forty-six".