28963140 has 24 divisors (see below), whose sum is σ = 81096960. Its totient is φ = 7723488.

The previous prime is 28963117. The next prime is 28963147. The reversal of 28963140 is 4136982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28963147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 241300 + ... + 241419.

It is an arithmetic number, because the mean of its divisors is an integer number (3379040).

Almost surely, 2^28963140 is an apocalyptic number.

28963140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28963140 is an abundant number, since it is smaller than the sum of its proper divisors (52133820).

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

28963140 is a wasteful number, since it uses less digits than its factorization.

28963140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482731 (or 482729 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28963140 is about 5381.7413538742. The cubic root of 28963140 is about 307.1014600263.

The spelling of 28963140 in words is "twenty-eight million, nine hundred sixty-three thousand, one hundred forty".