1011445920 has 96 divisors (see below), whose sum is σ = 3540075840. Its totient is φ = 269717760.

The previous prime is 1011445901. The next prime is 1011445951. The reversal of 1011445920 is 295441101.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 112746 + ... + 121385.

It is an arithmetic number, because the mean of its divisors is an integer number (36875790).

Almost surely, 2^1011445920 is an apocalyptic number.

1011445920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011445920 is an abundant number, since it is smaller than the sum of its proper divisors (2528629920).

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

1011445920 is a wasteful number, since it uses less digits than its factorization.

1011445920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234155 (or 234141 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1011445920 is about 31803.2375710398. The cubic root of 1011445920 is about 1003.8008419642.

The spelling of 1011445920 in words is "one billion, eleven million, four hundred forty-five thousand, nine hundred twenty".