961869870 has 128 divisors (see below), whose sum is σ = 2907878400. Its totient is φ = 224290944.

The previous prime is 961869869. The next prime is 961869907. The reversal of 961869870 is 78968169.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 59479 + ... + 73901.

It is an arithmetic number, because the mean of its divisors is an integer number (22717800).

Almost surely, 2^961869870 is an apocalyptic number.

961869870 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 961869870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453939200).

961869870 is an abundant number, since it is smaller than the sum of its proper divisors (1946008530).

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

961869870 is a wasteful number, since it uses less digits than its factorization.

961869870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14471 (or 14465 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 961869870 is about 31014.0269878002. The cubic root of 961869870 is about 987.1248998913.

The spelling of 961869870 in words is "nine hundred sixty-one million, eight hundred sixty-nine thousand, eight hundred seventy".