28037140 has 12 divisors (see below), whose sum is σ = 58878036. Its totient is φ = 11214848.

The previous prime is 28037137. The next prime is 28037143. The reversal of 28037140 is 4173082.

It is an interprime number because it is at equal distance from previous prime (28037137) and next prime (28037143).

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 5626384 = 4734^2 + 2372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28037143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700909 + ... + 700948.

It is an arithmetic number, because the mean of its divisors is an integer number (4906503).

Almost surely, 2^28037140 is an apocalyptic number.

28037140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28037140 is an abundant number, since it is smaller than the sum of its proper divisors (30840896).

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

28037140 is a wasteful number, since it uses less digits than its factorization.

28037140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401866 (or 1401864 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28037140 is about 5295.0108592901. The cubic root of 28037140 is about 303.7930984813.

The spelling of 28037140 in words is "twenty-eight million, thirty-seven thousand, one hundred forty".