961811028 has 18 divisors (see below), whose sum is σ = 2431244634. Its totient is φ = 320603664.

The previous prime is 961811021. The next prime is 961811029. The reversal of 961811028 is 820118169.

961811028 is a `hidden beast` number, since 9 + 618 + 1 + 10 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 744307524 + 217503504 = 27282^2 + 14748^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 26716973 = 961811028 / (9 + 6 + 1 + 8 + 1 + 1 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 961810983 and 961811001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961811021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13358451 + ... + 13358522.

Almost surely, 2^961811028 is an apocalyptic number.

It is an amenable number.

961811028 is an abundant number, since it is smaller than the sum of its proper divisors (1469433606).

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

961811028 is a wasteful number, since it uses less digits than its factorization.

961811028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26716983 (or 26716978 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 961811028 is about 31013.0783380173. The cubic root of 961811028 is about 987.1047704920.

The spelling of 961811028 in words is "nine hundred sixty-one million, eight hundred eleven thousand, twenty-eight".