1961880 has 32 divisors (see below), whose sum is σ = 5886000. Its totient is φ = 523136.

The previous prime is 1961873. The next prime is 1961887. The reversal of 1961880 is 881691.

It is an interprime number because it is at equal distance from previous prime (1961873) and next prime (1961887).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961887) 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, 8055 + ... + 8294.

2^1961880 is an apocalyptic number.

1961880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961880 is an abundant number, since it is smaller than the sum of its proper divisors (3924120).

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

1961880 is a wasteful number, since it uses less digits than its factorization.

1961880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16363 (or 16359 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1961880 is about 1400.6712676428. The cubic root of 1961880 is about 125.1864949520.

The spelling of 1961880 in words is "one million, nine hundred sixty-one thousand, eight hundred eighty".