28338140 has 24 divisors (see below), whose sum is σ = 60041520. Its totient is φ = 11234048.

The previous prime is 28338137. The next prime is 28338143. The reversal of 28338140 is 4183382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28338137) and next prime (28338143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4010 + ... + 8529.

It is an arithmetic number, because the mean of its divisors is an integer number (2501730).

Almost surely, 2^28338140 is an apocalyptic number.

28338140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28338140 is an abundant number, since it is smaller than the sum of its proper divisors (31703380).

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

28338140 is a wasteful number, since it uses less digits than its factorization.

28338140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661 (or 12659 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28338140 is about 5323.3579627900. The cubic root of 28338140 is about 304.8763809699.

The spelling of 28338140 in words is "twenty-eight million, three hundred thirty-eight thousand, one hundred forty".