28375420 has 12 divisors (see below), whose sum is σ = 59588424. Its totient is φ = 11350160.

The previous prime is 28375393. The next prime is 28375421. The reversal of 28375420 is 2457382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28375421) 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, 709366 + ... + 709405.

It is an arithmetic number, because the mean of its divisors is an integer number (4965702).

Almost surely, 2^28375420 is an apocalyptic number.

28375420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28375420 is an abundant number, since it is smaller than the sum of its proper divisors (31213004).

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

28375420 is a wasteful number, since it uses less digits than its factorization.

28375420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418780 (or 1418778 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28375420 is about 5326.8583611731. The cubic root of 28375420 is about 305.0100149000.

The spelling of 28375420 in words is "twenty-eight million, three hundred seventy-five thousand, four hundred twenty".