52811940 has 24 divisors (see below), whose sum is σ = 147873600. Its totient is φ = 14083168.

The previous prime is 52811939. The next prime is 52811947. The reversal of 52811940 is 4911825.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 52811898 and 52811907.

It is not an unprimeable number, because it can be changed into a prime (52811947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440040 + ... + 440159.

It is an arithmetic number, because the mean of its divisors is an integer number (6161400).

Almost surely, 2^52811940 is an apocalyptic number.

It is an amenable number.

52811940 is an abundant number, since it is smaller than the sum of its proper divisors (95061660).

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

52811940 is a wasteful number, since it uses less digits than its factorization.

52811940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880211 (or 880209 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 52811940 is about 7267.1823976009. The cubic root of 52811940 is about 375.1837677082.

The spelling of 52811940 in words is "fifty-two million, eight hundred eleven thousand, nine hundred forty".