1101290320 has 80 divisors (see below), whose sum is σ = 2773853712. Its totient is φ = 404213760.

The previous prime is 1101290287. The next prime is 1101290327. The reversal of 1101290320 is 230921011.

It can be written as a sum of positive squares in 8 ways, for example, as 65480464 + 1035809856 = 8092^2 + 32184^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101290327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176860 + ... + 182980.

Almost surely, 2^1101290320 is an apocalyptic number.

1101290320 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 1101290320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1386926856).

1101290320 is an abundant number, since it is smaller than the sum of its proper divisors (1672563392).

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

1101290320 is a wasteful number, since it uses less digits than its factorization.

1101290320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320 (or 6314 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1101290320 is about 33185.6945083269. The cubic root of 1101290320 is about 1032.6835855196.

The spelling of 1101290320 in words is "one billion, one hundred one million, two hundred ninety thousand, three hundred twenty".