1987622 has 32 divisors (see below), whose sum is σ = 3747072. Its totient is φ = 769824.

The previous prime is 1987621. The next prime is 1987649. The reversal of 1987622 is 2267891.

It is a happy number.

It is an Ulam number.

Its product of digits (12096) is a multiple of the sum of its prime divisors (252).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987621) 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, 12113 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (117096).

2^1987622 is an apocalyptic number.

1987622 is a deficient number, since it is larger than the sum of its proper divisors (1759450).

1987622 is a wasteful number, since it uses less digits than its factorization.

1987622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 12096, while the sum is 35.

The square root of 1987622 is about 1409.8304862642. The cubic root of 1987622 is about 125.7316452071.

The spelling of 1987622 in words is "one million, nine hundred eighty-seven thousand, six hundred twenty-two".