1101539840 has 40 divisors (see below), whose sum is σ = 2641120020. Its totient is φ = 440614912.

The previous prime is 1101539821. The next prime is 1101539867. The reversal of 1101539840 is 489351011.

It can be written as a sum of positive squares in 2 ways, for example, as 962488576 + 139051264 = 31024^2 + 11792^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1101539797 and 1101539806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212585 + ... + 217704.

Almost surely, 2^1101539840 is an apocalyptic number.

1101539840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101539840 is an abundant number, since it is smaller than the sum of its proper divisors (1539580180).

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

1101539840 is an frugal number, since it uses more digits than its factorization.

1101539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430312 (or 430296 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1101539840 is about 33189.4537466346. The cubic root of 1101539840 is about 1032.7615715406.

The spelling of 1101539840 in words is "one billion, one hundred one million, five hundred thirty-nine thousand, eight hundred forty".