28166340 has 24 divisors (see below), whose sum is σ = 78865920. Its totient is φ = 7511008.

The previous prime is 28166317. The next prime is 28166353. The reversal of 28166340 is 4366182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28166298 and 28166307.

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, 234660 + ... + 234779.

It is an arithmetic number, because the mean of its divisors is an integer number (3286080).

Almost surely, 2^28166340 is an apocalyptic number.

28166340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28166340 is an abundant number, since it is smaller than the sum of its proper divisors (50699580).

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

28166340 is a wasteful number, since it uses less digits than its factorization.

28166340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469451 (or 469449 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 28166340 is about 5307.1970003006. The cubic root of 28166340 is about 304.2590272675.

The spelling of 28166340 in words is "twenty-eight million, one hundred sixty-six thousand, three hundred forty".