840143772 has 192 divisors, whose sum is σ = 2458624000. Its totient is φ = 246343680.

The previous prime is 840143743. The next prime is 840143783. The reversal of 840143772 is 277341048.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 4221729 + ... + 4221927.

Almost surely, 2^840143772 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 840143772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229312000).

840143772 is an abundant number, since it is smaller than the sum of its proper divisors (1618480228).

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

840143772 is a wasteful number, since it uses less digits than its factorization.

840143772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 840143772 is about 28985.2336888975. The cubic root of 840143772 is about 943.5926241272.

The spelling of 840143772 in words is "eight hundred forty million, one hundred forty-three thousand, seven hundred seventy-two".