53821940 has 12 divisors (see below), whose sum is σ = 113026116. Its totient is φ = 21528768.

The previous prime is 53821913. The next prime is 53821967. The reversal of 53821940 is 4912835.

53821940 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 (53821913) and next prime (53821967).

It can be written as a sum of positive squares in 2 ways, for example, as 9572836 + 44249104 = 3094^2 + 6652^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53821897 and 53821906.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1345529 + ... + 1345568.

It is an arithmetic number, because the mean of its divisors is an integer number (9418843).

Almost surely, 2^53821940 is an apocalyptic number.

It is an amenable number.

53821940 is an abundant number, since it is smaller than the sum of its proper divisors (59204176).

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

53821940 is a wasteful number, since it uses less digits than its factorization.

53821940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691106 (or 2691104 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 53821940 is about 7336.3437760236. The cubic root of 53821940 is about 377.5604101968.

The spelling of 53821940 in words is "fifty-three million, eight hundred twenty-one thousand, nine hundred forty".