28622687 has 8 divisors (see below), whose sum is σ = 28929792. Its totient is φ = 28317600.

The previous prime is 28622669. The next prime is 28622689. The reversal of 28622687 is 78622682.

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

It is a cyclic number.

It is not a de Polignac number, because 28622687 - 2⁸ = 28622431 is a prime.

It is a super-2 number, since 2×28622687² = 1638516422199938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28622689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52637 + ... + 53177.

It is an arithmetic number, because the mean of its divisors is an integer number (3616224).

Almost surely, 2^28622687 is an apocalyptic number.

28622687 is a deficient number, since it is larger than the sum of its proper divisors (307105).

28622687 is a wasteful number, since it uses less digits than its factorization.

28622687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009.

The product of its digits is 129024, while the sum is 41.

The square root of 28622687 is about 5350.0174766070. The cubic root of 28622687 is about 305.8934191023.

The spelling of 28622687 in words is "twenty-eight million, six hundred twenty-two thousand, six hundred eighty-seven".