1881516 has 48 divisors (see below), whose sum is σ = 5406464. Its totient is φ = 495936.

The previous prime is 1881511. The next prime is 1881521. The reversal of 1881516 is 6151881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1881511) and next prime (1881521).

It is not an unprimeable number, because it can be changed into a prime (1881511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231 + ... + 1953.

2^1881516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703232).

1881516 is an abundant number, since it is smaller than the sum of its proper divisors (3524948).

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

1881516 is a wasteful number, since it uses less digits than its factorization.

1881516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750 (or 1748 counting only the distinct ones).

The product of its digits is 1920, while the sum is 30.

The square root of 1881516 is about 1371.6836369951. The cubic root of 1881516 is about 123.4532815693.

The spelling of 1881516 in words is "one million, eight hundred eighty-one thousand, five hundred sixteen".