1618980 has 72 divisors (see below), whose sum is σ = 5005056. Its totient is φ = 390720.

The previous prime is 1618979. The next prime is 1619021. The reversal of 1618980 is 898161.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7149 + ... + 7371.

2^1618980 is an apocalyptic number.

1618980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502528).

1618980 is an abundant number, since it is smaller than the sum of its proper divisors (3386076).

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

1618980 is a wasteful number, since it uses less digits than its factorization.

1618980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 244 counting only the distinct ones).

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

The square root of 1618980 is about 1272.3914492011. The cubic root of 1618980 is about 117.4213748933.

The spelling of 1618980 in words is "one million, six hundred eighteen thousand, nine hundred eighty".