1961904 has 40 divisors (see below), whose sum is σ = 5793280. Its totient is φ = 560448.

The previous prime is 1961903. The next prime is 1961909. The reversal of 1961904 is 4091691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961903) 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, 2584 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (144832).

2^1961904 is an apocalyptic number.

1961904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1961904 is an abundant number, since it is smaller than the sum of its proper divisors (3831376).

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

1961904 is a wasteful number, since it uses less digits than its factorization.

1961904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857 (or 5851 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1961904 is about 1400.6798349373. The cubic root of 1961904 is about 125.1870054256.

The spelling of 1961904 in words is "one million, nine hundred sixty-one thousand, nine hundred four".