1780625742 has 32 divisors (see below), whose sum is σ = 4071945984. Its totient is φ = 508507200.

The previous prime is 1780625741. The next prime is 1780625783. The reversal of 1780625742 is 2475260871.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1780625694 and 1780625703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780625741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90642 + ... + 108522.

It is an arithmetic number, because the mean of its divisors is an integer number (127248312).

Almost surely, 2^1780625742 is an apocalyptic number.

1780625742 is an abundant number, since it is smaller than the sum of its proper divisors (2291320242).

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

1780625742 is a wasteful number, since it uses less digits than its factorization.

1780625742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 1780625742 is about 42197.4613217430. The cubic root of 1780625742 is about 1212.0602702331.

The spelling of 1780625742 in words is "one billion, seven hundred eighty million, six hundred twenty-five thousand, seven hundred forty-two".