1830790042 has 4 divisors (see below), whose sum is σ = 2746185066. Its totient is φ = 915395020.

The previous prime is 1830790037. The next prime is 1830790043. The reversal of 1830790042 is 2400970381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2400970381 = 347 ⋅6919223.

It can be written as a sum of positive squares in only one way, i.e., 1830213961 + 576081 = 42781^2 + 759^2 .

It is not an unprimeable number, because it can be changed into a prime (1830790043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457697509 + ... + 457697512.

Almost surely, 2^1830790042 is an apocalyptic number.

1830790042 is a deficient number, since it is larger than the sum of its proper divisors (915395024).

1830790042 is an equidigital number, since it uses as much as digits as its factorization.

1830790042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915395023.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1830790042 is about 42787.7323774000. The cubic root of 1830790042 is about 1223.3371951724.

The spelling of 1830790042 in words is "one billion, eight hundred thirty million, seven hundred ninety thousand, forty-two".