961443720 has 48 divisors (see below), whose sum is σ = 3124693260. Its totient is φ = 256384896.

The previous prime is 961443701. The next prime is 961443733. The reversal of 961443720 is 27344169.

961443720 is a `hidden beast` number, since 9 + 614 + 4 + 37 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 941139684 + 20304036 = 30678^2 + 4506^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334979 + ... + 1335698.

Almost surely, 2^961443720 is an apocalyptic number.

961443720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

961443720 is an abundant number, since it is smaller than the sum of its proper divisors (2163249540).

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

961443720 is a wasteful number, since it uses less digits than its factorization.

961443720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670694 (or 2670687 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 961443720 is about 31007.1559482646. The cubic root of 961443720 is about 986.9790986665.

Adding to 961443720 its reverse (27344169), we get a palindrome (988787889).

The spelling of 961443720 in words is "nine hundred sixty-one million, four hundred forty-three thousand, seven hundred twenty".