28670140 has 24 divisors (see below), whose sum is σ = 60646320. Its totient is φ = 11384448.

The previous prime is 28670101. The next prime is 28670179. The reversal of 28670140 is 4107682.

It is an interprime number because it is at equal distance from previous prime (28670101) and next prime (28670179).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28670099 and 28670108.

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, 2377 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (2526930).

Almost surely, 2^28670140 is an apocalyptic number.

28670140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28670140 is an abundant number, since it is smaller than the sum of its proper divisors (31976180).

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

28670140 is a wasteful number, since it uses less digits than its factorization.

28670140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461 (or 10459 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28670140 is about 5354.4504853439. The cubic root of 28670140 is about 306.0623707002.

The spelling of 28670140 in words is "twenty-eight million, six hundred seventy thousand, one hundred forty".