28761618 has 8 divisors (see below), whose sum is σ = 57523248. Its totient is φ = 9587204.

The previous prime is 28761599. The next prime is 28761631. The reversal of 28761618 is 81616782.

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

28761618 is an admirable number.

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, 2396796 + ... + 2396807.

It is an arithmetic number, because the mean of its divisors is an integer number (7190406).

Almost surely, 2^28761618 is an apocalyptic number.

28761618 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.

28761618 is a wasteful number, since it uses less digits than its factorization.

28761618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793608.

The product of its digits is 32256, while the sum is 39.

The square root of 28761618 is about 5362.9859220401. The cubic root of 28761618 is about 306.3875434926.

The spelling of 28761618 in words is "twenty-eight million, seven hundred sixty-one thousand, six hundred eighteen".