1092421980 has 144 divisors (see below), whose sum is σ = 3602158560. Its totient is φ = 266374656.

The previous prime is 1092421973. The next prime is 1092421991. The reversal of 1092421980 is 891242901.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 252919 + ... + 257201.

It is an arithmetic number, because the mean of its divisors is an integer number (25014990).

Almost surely, 2^1092421980 is an apocalyptic number.

1092421980 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 1092421980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801079280).

1092421980 is an abundant number, since it is smaller than the sum of its proper divisors (2509736580).

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

1092421980 is a wasteful number, since it uses less digits than its factorization.

1092421980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420 (or 4415 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1092421980 is about 33051.8075148697. The cubic root of 1092421980 is about 1029.9041542134.

The spelling of 1092421980 in words is "one billion, ninety-two million, four hundred twenty-one thousand, nine hundred eighty".