1790540442 has 36 divisors (see below), whose sum is σ = 3946192926. Its totient is φ = 586602720.

The previous prime is 1790540441. The next prime is 1790540443. The reversal of 1790540442 is 2440450971.

It is a happy number.

1790540442 is a `hidden beast` number, since 1 + 79 + 0 + 540 + 4 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (1790540441) and next prime (1790540443).

It can be written as a sum of positive squares in 3 ways, for example, as 1324887201 + 465653241 = 36399^2 + 21579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1790540397 and 1790540406.

It is not an unprimeable number, because it can be changed into a prime (1790540441) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1401508 + ... + 1402784.

Almost surely, 2^1790540442 is an apocalyptic number.

1790540442 is an abundant number, since it is smaller than the sum of its proper divisors (2155652484).

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

1790540442 is an equidigital number, since it uses as much as digits as its factorization.

1790540442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1790540442 is about 42314.7780568444. The cubic root of 1790540442 is about 1214.3057314914.

The spelling of 1790540442 in words is "one billion, seven hundred ninety million, five hundred forty thousand, four hundred forty-two".