1961642936 has 32 divisors (see below), whose sum is σ = 4047980400. Its totient is φ = 883760640.

The previous prime is 1961642899. The next prime is 1961642939. The reversal of 1961642936 is 6392461691.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961642939) 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 7 ways as a sum of consecutive naturals, for example, 88691 + ... + 108578.

Almost surely, 2^1961642936 is an apocalyptic number.

It is an amenable number.

1961642936 is an abundant number, since it is smaller than the sum of its proper divisors (2086337464).

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

1961642936 is a wasteful number, since it uses less digits than its factorization.

1961642936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197399 (or 197395 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 1961642936 is about 44290.4384263692. The cubic root of 1961642936 is about 1251.8145244064.

The spelling of 1961642936 in words is "one billion, nine hundred sixty-one million, six hundred forty-two thousand, nine hundred thirty-six".