1029980 has 36 divisors (see below), whose sum is σ = 2518488. Its totient is φ = 352800.

The previous prime is 1029967. The next prime is 1029983. The reversal of 1029980 is 899201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455 + ... + 1505.

It is an arithmetic number, because the mean of its divisors is an integer number (69958).

2^1029980 is an apocalyptic number.

1029980 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 1029980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259244).

1029980 is an abundant number, since it is smaller than the sum of its proper divisors (1488508).

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

1029980 is a wasteful number, since it uses less digits than its factorization.

1029980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1029980 is about 1014.8793031686. The cubic root of 1029980 is about 100.9895097427.

The spelling of 1029980 in words is "one million, twenty-nine thousand, nine hundred eighty".