1081556436 has 24 divisors (see below), whose sum is σ = 2542899744. Its totient is φ = 357766240.

The previous prime is 1081556429. The next prime is 1081556447. The reversal of 1081556436 is 6346551801.

It is a junction number, because it is equal to n+sod(n) for n = 1081556394 and 1081556403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342435 + ... + 345578.

It is an arithmetic number, because the mean of its divisors is an integer number (105954156).

Almost surely, 2^1081556436 is an apocalyptic number.

It is an amenable number.

1081556436 is an abundant number, since it is smaller than the sum of its proper divisors (1461343308).

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

1081556436 is a wasteful number, since it uses less digits than its factorization.

1081556436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688151 (or 688149 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1081556436 is about 32887.0253443512. The cubic root of 1081556436 is about 1026.4781958996.

The spelling of 1081556436 in words is "one billion, eighty-one million, five hundred fifty-six thousand, four hundred thirty-six".