1085620240 has 80 divisors (see below), whose sum is σ = 2650330368. Its totient is φ = 412763648.

The previous prime is 1085620231. The next prime is 1085620243. The reversal of 1085620240 is 420265801.

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

It is a junction number, because it is equal to n+sod(n) for n = 1085620199 and 1085620208.

It is not an unprimeable number, because it can be changed into a prime (1085620243) 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, 305514 + ... + 309046.

Almost surely, 2^1085620240 is an apocalyptic number.

1085620240 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 1085620240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325165184).

1085620240 is an abundant number, since it is smaller than the sum of its proper divisors (1564710128).

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

1085620240 is a wasteful number, since it uses less digits than its factorization.

1085620240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736 (or 3730 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1085620240 is about 32948.7517214234. The cubic root of 1085620240 is about 1027.7622073598.

The spelling of 1085620240 in words is "one billion, eighty-five million, six hundred twenty thousand, two hundred forty".