53668890 has 96 divisors (see below), whose sum is σ = 158910336. Its totient is φ = 12439680.

The previous prime is 53668883. The next prime is 53668897. The reversal of 53668890 is 9886635.

53668890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53668883) and next prime (53668897).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53668897) 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 47 ways as a sum of consecutive naturals, for example, 21592 + ... + 23948.

It is an arithmetic number, because the mean of its divisors is an integer number (1655316).

Almost surely, 2^53668890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53668890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79455168).

53668890 is an abundant number, since it is smaller than the sum of its proper divisors (105241446).

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

53668890 is a wasteful number, since it uses less digits than its factorization.

53668890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 53668890 is about 7325.9054047947. The cubic root of 53668890 is about 377.2021889880.

The spelling of 53668890 in words is "fifty-three million, six hundred sixty-eight thousand, eight hundred ninety".