1098556992 has 140 divisors (see below), whose sum is σ = 3507179676. Its totient is φ = 337996800.

The previous prime is 1098556969. The next prime is 1098556997. The reversal of 1098556992 is 2996558901.

It can be written as a sum of positive squares in 2 ways, for example, as 540841536 + 557715456 = 23256^2 + 23616^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1098556997) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59242 + ... + 75542.

Almost surely, 2^1098556992 is an apocalyptic number.

1098556992 is a gapful number since it is divisible by the number (12) 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 1098556992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753589838).

1098556992 is an abundant number, since it is smaller than the sum of its proper divisors (2408622684).

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

1098556992 is a wasteful number, since it uses less digits than its factorization.

1098556992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16338 (or 16319 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The square root of 1098556992 is about 33144.4866003382. The cubic root of 1098556992 is about 1031.8285274867.

The spelling of 1098556992 in words is "one billion, ninety-eight million, five hundred fifty-six thousand, nine hundred ninety-two".