961405428 has 48 divisors (see below), whose sum is σ = 2346140160. Its totient is φ = 305837664.

The previous prime is 961405411. The next prime is 961405429. The reversal of 961405428 is 824504169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961405429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125163 + ... + 132621.

It is an arithmetic number, because the mean of its divisors is an integer number (48877920).

Almost surely, 2^961405428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961405428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173070080).

961405428 is an abundant number, since it is smaller than the sum of its proper divisors (1384734732).

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

961405428 is a wasteful number, since it uses less digits than its factorization.

961405428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956 (or 7954 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 961405428 is about 31006.5384717482. The cubic root of 961405428 is about 986.9659954882.

The spelling of 961405428 in words is "nine hundred sixty-one million, four hundred five thousand, four hundred twenty-eight".