53394990 has 64 divisors (see below), whose sum is σ = 140590080. Its totient is φ = 12871040.

The previous prime is 53394973. The next prime is 53395007. The reversal of 53394990 is 9949335.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53394973) and next prime (53395007).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78532 + ... + 79208.

It is an arithmetic number, because the mean of its divisors is an integer number (2196720).

Almost surely, 2^53394990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53394990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70295040).

53394990 is an abundant number, since it is smaller than the sum of its proper divisors (87195090).

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

53394990 is a wasteful number, since it uses less digits than its factorization.

53394990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 53394990 is about 7307.1875574670. The cubic root of 53394990 is about 376.5594085534.

The spelling of 53394990 in words is "fifty-three million, three hundred ninety-four thousand, nine hundred ninety".