842621970 has 64 divisors (see below), whose sum is σ = 2103978240. Its totient is φ = 215712000.

The previous prime is 842621953. The next prime is 842621977. The reversal of 842621970 is 79126248.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842621977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154795 + ... + 160145.

It is an arithmetic number, because the mean of its divisors is an integer number (32874660).

Almost surely, 2^842621970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842621970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051989120).

842621970 is an abundant number, since it is smaller than the sum of its proper divisors (1261356270).

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

842621970 is a wasteful number, since it uses less digits than its factorization.

842621970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 842621970 is about 29027.9515295172. The cubic root of 842621970 is about 944.5194948075.

The spelling of 842621970 in words is "eight hundred forty-two million, six hundred twenty-one thousand, nine hundred seventy".