1080631720 has 32 divisors (see below), whose sum is σ = 2778768000. Its totient is φ = 370502208.

The previous prime is 1080631703. The next prime is 1080631729. The reversal of 1080631720 is 271360801.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1080631729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1929420 + ... + 1929979.

It is an arithmetic number, because the mean of its divisors is an integer number (86836500).

Almost surely, 2^1080631720 is an apocalyptic number.

1080631720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1080631720 is an abundant number, since it is smaller than the sum of its proper divisors (1698136280).

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

1080631720 is a wasteful number, since it uses less digits than its factorization.

1080631720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859417 (or 3859413 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1080631720 is about 32872.9633589672. The cubic root of 1080631720 is about 1026.1855708682.

The spelling of 1080631720 in words is "one billion, eighty million, six hundred thirty-one thousand, seven hundred twenty".