1987722 has 24 divisors (see below), whose sum is σ = 4698720. Its totient is φ = 602280.

The previous prime is 1987709. The next prime is 1987789. The reversal of 1987722 is 2277891.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4822 + ... + 5217.

It is an arithmetic number, because the mean of its divisors is an integer number (195780).

2^1987722 is an apocalyptic number.

1987722 is an abundant number, since it is smaller than the sum of its proper divisors (2710998).

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

1987722 is a wasteful number, since it uses less digits than its factorization.

1987722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10058 (or 10055 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1987722 is about 1409.8659510748. The cubic root of 1987722 is about 125.7337537491.

The spelling of 1987722 in words is "one million, nine hundred eighty-seven thousand, seven hundred twenty-two".