28262140 has 12 divisors (see below), whose sum is σ = 59350536. Its totient is φ = 11304848.

The previous prime is 28262119. The next prime is 28262149. The reversal of 28262140 is 4126282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28262149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706534 + ... + 706573.

It is an arithmetic number, because the mean of its divisors is an integer number (4945878).

Almost surely, 2^28262140 is an apocalyptic number.

28262140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28262140 is an abundant number, since it is smaller than the sum of its proper divisors (31088396).

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

28262140 is a wasteful number, since it uses less digits than its factorization.

28262140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413116 (or 1413114 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28262140 is about 5316.2148188349. The cubic root of 28262140 is about 304.6035878413.

The spelling of 28262140 in words is "twenty-eight million, two hundred sixty-two thousand, one hundred forty".