1961350188 has 48 divisors (see below), whose sum is σ = 5235256320. Its totient is φ = 559851264.

The previous prime is 1961350151. The next prime is 1961350199. The reversal of 1961350188 is 8810531691.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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, 82068 + ... + 103236.

It is an arithmetic number, because the mean of its divisors is an integer number (109067840).

Almost surely, 2^1961350188 is an apocalyptic number.

It is an amenable number.

1961350188 is an abundant number, since it is smaller than the sum of its proper divisors (3273906132).

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

1961350188 is a wasteful number, since it uses less digits than its factorization.

1961350188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22286 (or 22284 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1961350188 is about 44287.1334362476. The cubic root of 1961350188 is about 1251.7522493234.

The spelling of 1961350188 in words is "one billion, nine hundred sixty-one million, three hundred fifty thousand, one hundred eighty-eight".