1961335904 has 24 divisors (see below), whose sum is σ = 4212415368. Its totient is φ = 891516160.

The previous prime is 1961335903. The next prime is 1961335907. The reversal of 1961335904 is 4095331691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961335903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785637 + ... + 2786340.

It is an arithmetic number, because the mean of its divisors is an integer number (175517307).

Almost surely, 2^1961335904 is an apocalyptic number.

It is an amenable number.

1961335904 is an abundant number, since it is smaller than the sum of its proper divisors (2251079464).

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

1961335904 is a wasteful number, since it uses less digits than its factorization.

1961335904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571998 (or 5571990 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 1961335904 is about 44286.9721701541. The cubic root of 1961335904 is about 1251.7492105881.

The spelling of 1961335904 in words is "one billion, nine hundred sixty-one million, three hundred thirty-five thousand, nine hundred four".