840266460 has 240 divisors, whose sum is σ = 2926500192. Its totient is φ = 200102400.

The previous prime is 840266419. The next prime is 840266473. The reversal of 840266460 is 64662048.

It is a happy number.

840266460 is a `hidden beast` number, since 8 + 4 + 0 + 2 + 6 + 646 + 0 = 666.

840266460 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1086634 + ... + 1087406.

Almost surely, 2^840266460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840266460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463250096).

840266460 is an abundant number, since it is smaller than the sum of its proper divisors (2086233732).

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

840266460 is a wasteful number, since it uses less digits than its factorization.

840266460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 840266460 is about 28987.3499996119. The cubic root of 840266460 is about 943.6385535110.

The spelling of 840266460 in words is "eight hundred forty million, two hundred sixty-six thousand, four hundred sixty".