840455450 has 48 divisors (see below), whose sum is σ = 1600611840. Its totient is φ = 328211520.

The previous prime is 840455431. The next prime is 840455453. The reversal of 840455450 is 54554048.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 840455450.

It is not an unprimeable number, because it can be changed into a prime (840455453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 632687 + ... + 634013.

It is an arithmetic number, because the mean of its divisors is an integer number (33346080).

Almost surely, 2^840455450 is an apocalyptic number.

840455450 is a deficient number, since it is larger than the sum of its proper divisors (760156390).

840455450 is a wasteful number, since it uses less digits than its factorization.

840455450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

The square root of 840455450 is about 28990.6096865864. The cubic root of 840455450 is about 943.7092949126.

The spelling of 840455450 in words is "eight hundred forty million, four hundred fifty-five thousand, four hundred fifty".