28655406 has 48 divisors (see below), whose sum is σ = 67420080. Its totient is φ = 8743680.

The previous prime is 28655399. The next prime is 28655411. The reversal of 28655406 is 60455682.

It is a super-2 number, since 2×28655406² = 1642264586049672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32086 + ... + 32966.

It is an arithmetic number, because the mean of its divisors is an integer number (1404585).

Almost surely, 2^28655406 is an apocalyptic number.

28655406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28655406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33710040).

28655406 is an abundant number, since it is smaller than the sum of its proper divisors (38764674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28655406 is a wasteful number, since it uses less digits than its factorization.

28655406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 28655406 is about 5353.0744437192. The cubic root of 28655406 is about 306.0099317551.

The spelling of 28655406 in words is "twenty-eight million, six hundred fifty-five thousand, four hundred six".