1961830 has 16 divisors (see below), whose sum is σ = 3803184. Its totient is φ = 724320.

The previous prime is 1961819. The next prime is 1961833. The reversal of 1961830 is 381691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7416 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (237699).

2^1961830 is an apocalyptic number.

1961830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961830 is a deficient number, since it is larger than the sum of its proper divisors (1841354).

1961830 is a wasteful number, since it uses less digits than its factorization.

1961830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15111.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1961830 is about 1400.6534189442. The cubic root of 1961830 is about 125.1854314521.

The spelling of 1961830 in words is "one million, nine hundred sixty-one thousand, eight hundred thirty".