840205452 has 24 divisors (see below), whose sum is σ = 1961093232. Its totient is φ = 279980800.

The previous prime is 840205451. The next prime is 840205453. The reversal of 840205452 is 254502048.

It is an interprime number because it is at equal distance from previous prime (840205451) and next prime (840205453).

It is not an unprimeable number, because it can be changed into a prime (840205451) 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, 37552 + ... + 55592.

It is an arithmetic number, because the mean of its divisors is an integer number (81712218).

Almost surely, 2^840205452 is an apocalyptic number.

It is an amenable number.

840205452 is an abundant number, since it is smaller than the sum of its proper divisors (1120887780).

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

840205452 is a wasteful number, since it uses less digits than its factorization.

840205452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21929 (or 21927 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 840205452 is about 28986.2976594114. The cubic root of 840205452 is about 943.6157151627.

The spelling of 840205452 in words is "eight hundred forty million, two hundred five thousand, four hundred fifty-two".