28372140 has 48 divisors (see below), whose sum is σ = 88270560. Its totient is φ = 7565760.

The previous prime is 28372117. The next prime is 28372151. The reversal of 28372140 is 4127382.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25731 + ... + 26810.

It is an arithmetic number, because the mean of its divisors is an integer number (1838970).

Almost surely, 2^28372140 is an apocalyptic number.

28372140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28372140 is an abundant number, since it is smaller than the sum of its proper divisors (59898420).

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

28372140 is a wasteful number, since it uses less digits than its factorization.

28372140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52559 (or 52551 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28372140 is about 5326.5504784992. The cubic root of 28372140 is about 304.9982621060.

The spelling of 28372140 in words is "twenty-eight million, three hundred seventy-two thousand, one hundred forty".