840526146 has 80 divisors (see below), whose sum is σ = 1927399320. Its totient is φ = 273715200.

The previous prime is 840526133. The next prime is 840526147. The reversal of 840526146 is 641625048.

It can be written as a sum of positive squares in 4 ways, for example, as 714974121 + 125552025 = 26739^2 + 11205^2 .

It is a super-2 number, since 2×840526146² = 1412968404219226632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840526146.

It is not an unprimeable number, because it can be changed into a prime (840526147) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1398246 + ... + 1398846.

Almost surely, 2^840526146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840526146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963699660).

840526146 is an abundant number, since it is smaller than the sum of its proper divisors (1086873174).

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

840526146 is a wasteful number, since it uses less digits than its factorization.

840526146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 840526146 is about 28991.8289523100. The cubic root of 840526146 is about 943.7357546144.

The spelling of 840526146 in words is "eight hundred forty million, five hundred twenty-six thousand, one hundred forty-six".