1780842434 has 8 divisors (see below), whose sum is σ = 3052872768. Its totient is φ = 763218180.

The previous prime is 1780842433. The next prime is 1780842457. The reversal of 1780842434 is 4342480871.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1780842391 and 1780842400.

It is not an unprimeable number, because it can be changed into a prime (1780842433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63601502 + ... + 63601529.

It is an arithmetic number, because the mean of its divisors is an integer number (381609096).

Almost surely, 2^1780842434 is an apocalyptic number.

1780842434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1780842434 is a deficient number, since it is larger than the sum of its proper divisors (1272030334).

1780842434 is a wasteful number, since it uses less digits than its factorization.

1780842434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127203040.

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 1780842434 is about 42200.0288388527. The cubic root of 1780842434 is about 1212.1094351801.

The spelling of 1780842434 in words is "one billion, seven hundred eighty million, eight hundred forty-two thousand, four hundred thirty-four".