28106040 has 32 divisors (see below), whose sum is σ = 84318480. Its totient is φ = 7494912.

The previous prime is 28106027. The next prime is 28106077. The reversal of 28106040 is 4060182.

It is a junction number, because it is equal to n+sod(n) for n = 28105998 and 28106016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116989 + ... + 117228.

Almost surely, 2^28106040 is an apocalyptic number.

28106040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28106040 is an abundant number, since it is smaller than the sum of its proper divisors (56212440).

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

28106040 is a wasteful number, since it uses less digits than its factorization.

28106040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234231 (or 234227 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28106040 is about 5301.5129915902. The cubic root of 28106040 is about 304.0417474984.

The spelling of 28106040 in words is "twenty-eight million, one hundred six thousand, forty".