1961402234 has 64 divisors (see below), whose sum is σ = 3580941312. Its totient is φ = 794745600.

The previous prime is 1961402231. The next prime is 1961402249. The reversal of 1961402234 is 4322041691.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961402234.

It is not an unprimeable number, because it can be changed into a prime (1961402231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 919349 + ... + 921479.

It is an arithmetic number, because the mean of its divisors is an integer number (55952208).

Almost surely, 2^1961402234 is an apocalyptic number.

1961402234 is a deficient number, since it is larger than the sum of its proper divisors (1619539078).

1961402234 is a wasteful number, since it uses less digits than its factorization.

1961402234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1961402234 is about 44287.7210296488. The cubic root of 1961402234 is about 1251.7633213087.

The spelling of 1961402234 in words is "one billion, nine hundred sixty-one million, four hundred two thousand, two hundred thirty-four".