1019998980 has 960 divisors, whose sum is σ = 4671862272. Its totient is φ = 179159040.

The previous prime is 1019998961. The next prime is 1019999003. The reversal of 1019998980 is 898999101.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 27567522 + ... + 27567558.

Almost surely, 2^1019998980 is an apocalyptic number.

1019998980 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 1019998980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2335931136).

1019998980 is an abundant number, since it is smaller than the sum of its proper divisors (3651863292).

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

1019998980 is a wasteful number, since it uses less digits than its factorization.

1019998980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 1019998980 is about 31937.4228766192. The cubic root of 1019998980 is about 1006.6223740191.

It can be divided in two parts, 1019 and 998980, that added together give a palindrome (999999).

The spelling of 1019998980 in words is "one billion, nineteen million, nine hundred ninety-eight thousand, nine hundred eighty".