53783028 has 90 divisors (see below), whose sum is σ = 152766614. Its totient is φ = 16402176.

The previous prime is 53783017. The next prime is 53783057. The reversal of 53783028 is 82038735.

It can be written as a sum of positive squares in 3 ways, for example, as 10381284 + 43401744 = 3222^2 + 6588^2 .

It is a super-2 number, since 2×53783028² = 5785228201697568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53782983 and 53783001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 475900 + ... + 476012.

Almost surely, 2^53783028 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 53783028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76383307).

53783028 is an abundant number, since it is smaller than the sum of its proper divisors (98983586).

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

53783028 is a wasteful number, since it uses less digits than its factorization.

53783028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 53783028 is about 7333.6912942938. The cubic root of 53783028 is about 377.4693991539.

The spelling of 53783028 in words is "fifty-three million, seven hundred eighty-three thousand, twenty-eight".