1880991 has 24 divisors (see below), whose sum is σ = 3155360. Its totient is φ = 1057536.

The previous prime is 1880971. The next prime is 1880993. The reversal of 1880991 is 1990881.

It is not a de Polignac number, because 1880991 - 2⁵ = 1880959 is a prime.

It is a super-3 number, since 3×1880991³ = 19965555933330246813, which contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4395 + ... + 4803.

2^1880991 is an apocalyptic number.

1880991 is a deficient number, since it is larger than the sum of its proper divisors (1274369).

1880991 is a wasteful number, since it uses less digits than its factorization.

1880991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1880991 is about 1371.4922529858. The cubic root of 1880991 is about 123.4417980985.

The spelling of 1880991 in words is "one million, eight hundred eighty thousand, nine hundred ninety-one".