28640246 has 8 divisors (see below), whose sum is σ = 43771104. Its totient is φ = 14049880.

The previous prime is 28640243. The next prime is 28640273. The reversal of 28640246 is 64204682.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28640243) 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, 134990 + ... + 135201.

It is an arithmetic number, because the mean of its divisors is an integer number (5471388).

Almost surely, 2^28640246 is an apocalyptic number.

28640246 is a deficient number, since it is larger than the sum of its proper divisors (15130858).

28640246 is a wasteful number, since it uses less digits than its factorization.

28640246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270246.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 28640246 is about 5351.6582476836. The cubic root of 28640246 is about 305.9559578917.

The spelling of 28640246 in words is "twenty-eight million, six hundred forty thousand, two hundred forty-six".