1791122440 has 16 divisors (see below), whose sum is σ = 4030025580. Its totient is φ = 716448960.

The previous prime is 1791122423. The next prime is 1791122449. The reversal of 1791122440 is 442211971.

It can be written as a sum of positive squares in 2 ways, for example, as 1690360996 + 100761444 = 41114^2 + 10038^2 .

It is not an unprimeable number, because it can be changed into a prime (1791122449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22388991 + ... + 22389070.

Almost surely, 2^1791122440 is an apocalyptic number.

1791122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1791122440 is an abundant number, since it is smaller than the sum of its proper divisors (2238903140).

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

1791122440 is a wasteful number, since it uses less digits than its factorization.

1791122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44778072 (or 44778068 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1791122440 is about 42321.6545045205. The cubic root of 1791122440 is about 1214.4372833836.

The spelling of 1791122440 in words is "one billion, seven hundred ninety-one million, one hundred twenty-two thousand, four hundred forty".