28483784 has 64 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 11625984.

The previous prime is 28483783. The next prime is 28483799. The reversal of 28483784 is 48738482.

28483784 = T₃₇ + T₃₈ + ... + T₅₅₄.

It is a super-2 number, since 2×28483784² = 1622651901917312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28483783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122132 + ... + 122364.

It is an arithmetic number, because the mean of its divisors is an integer number (1000350).

Almost surely, 2^28483784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28483784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32011200).

28483784 is an abundant number, since it is smaller than the sum of its proper divisors (35538616).

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

28483784 is a wasteful number, since it uses less digits than its factorization.

28483784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 338 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 28483784 is about 5337.0201423641. The cubic root of 28483784 is about 305.3977932382.

The spelling of 28483784 in words is "twenty-eight million, four hundred eighty-three thousand, seven hundred eighty-four".