28203960 has 64 divisors (see below), whose sum is σ = 86021280. Its totient is φ = 7395840.

The previous prime is 28203949. The next prime is 28203971. The reversal of 28203960 is 6930282.

It is an interprime number because it is at equal distance from previous prime (28203949) and next prime (28203971).

It is a super-3 number, since 3×28203960³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5394 + ... + 9246.

Almost surely, 2^28203960 is an apocalyptic number.

28203960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28203960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43010640).

28203960 is an abundant number, since it is smaller than the sum of its proper divisors (57817320).

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

28203960 is a wasteful number, since it uses less digits than its factorization.

28203960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928 (or 3924 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28203960 is about 5310.7400614227. The cubic root of 28203960 is about 304.3944268542.

The spelling of 28203960 in words is "twenty-eight million, two hundred three thousand, nine hundred sixty".