1085861916 has 48 divisors (see below), whose sum is σ = 2820871200. Its totient is φ = 361224576.

The previous prime is 1085861899. The next prime is 1085861923. The reversal of 1085861916 is 6191685801.

1085861916 is a `hidden beast` number, since 10 + 8 + 5 + 8 + 619 + 16 = 666.

It is a super-2 number, since 2×1085861916² = 2358192201238382112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45096 + ... + 64848.

It is an arithmetic number, because the mean of its divisors is an integer number (58768150).

Almost surely, 2^1085861916 is an apocalyptic number.

It is an amenable number.

1085861916 is an abundant number, since it is smaller than the sum of its proper divisors (1735009284).

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

1085861916 is a wasteful number, since it uses less digits than its factorization.

1085861916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20275 (or 20267 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1085861916 is about 32952.4189703882. The cubic root of 1085861916 is about 1027.8384670010.

The spelling of 1085861916 in words is "one billion, eighty-five million, eight hundred sixty-one thousand, nine hundred sixteen".