1081562440 has 64 divisors (see below), whose sum is σ = 2944771200. Its totient is φ = 349006848.

The previous prime is 1081562401. The next prime is 1081562477. The reversal of 1081562440 is 442651801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108850 + ... + 118369.

It is an arithmetic number, because the mean of its divisors is an integer number (46012050).

Almost surely, 2^1081562440 is an apocalyptic number.

1081562440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081562440 is an abundant number, since it is smaller than the sum of its proper divisors (1863208760).

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

1081562440 is a wasteful number, since it uses less digits than its factorization.

1081562440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227254 (or 227250 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 1081562440 is about 32887.1166264238. The cubic root of 1081562440 is about 1026.4800953115.

The spelling of 1081562440 in words is "one billion, eighty-one million, five hundred sixty-two thousand, four hundred forty".