1080855729 has 24 divisors (see below), whose sum is σ = 1611135552. Its totient is φ = 697727520.

The previous prime is 1080855707. The next prime is 1080855761. The reversal of 1080855729 is 9275580801.

It is a happy number.

1080855729 is a `hidden beast` number, since 10 + 80 + 8 + 557 + 2 + 9 = 666.

It is not a de Polignac number, because 1080855729 - 2⁸ = 1080855473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1080855029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62572 + ... + 77954.

It is an arithmetic number, because the mean of its divisors is an integer number (67130648).

Almost surely, 2^1080855729 is an apocalyptic number.

It is an amenable number.

1080855729 is a deficient number, since it is larger than the sum of its proper divisors (530279823).

1080855729 is a wasteful number, since it uses less digits than its factorization.

1080855729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15637 (or 15634 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 1080855729 is about 32876.3703744802. The cubic root of 1080855729 is about 1026.2564735070.

The spelling of 1080855729 in words is "one billion, eighty million, eight hundred fifty-five thousand, seven hundred twenty-nine".