1085619920 has 80 divisors (see below), whose sum is σ = 3146905728. Its totient is φ = 338373120.

The previous prime is 1085619893. The next prime is 1085619943. The reversal of 1085619920 is 299165801.

It is a happy number.

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

It is a super-2 number, since 2×1085619920² = 2357141221401612800, 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, 81959 + ... + 94278.

Almost surely, 2^1085619920 is an apocalyptic number.

1085619920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1085619920 is an abundant number, since it is smaller than the sum of its proper divisors (2061285808).

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

1085619920 is a wasteful number, since it uses less digits than its factorization.

1085619920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176268 (or 176262 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 1085619920 is about 32948.7468653969. The cubic root of 1085619920 is about 1027.7621063779.

The spelling of 1085619920 in words is "one billion, eighty-five million, six hundred nineteen thousand, nine hundred twenty".