1780030640 has 20 divisors (see below), whose sum is σ = 4138571424. Its totient is φ = 712012224.

The previous prime is 1780030639. The next prime is 1780030667. The reversal of 1780030640 is 460300871.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11125112 + ... + 11125271.

Almost surely, 2^1780030640 is an apocalyptic number.

1780030640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780030640 is an abundant number, since it is smaller than the sum of its proper divisors (2358540784).

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

1780030640 is a wasteful number, since it uses less digits than its factorization.

1780030640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22250396 (or 22250390 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1780030640 is about 42190.4093367201. The cubic root of 1780030640 is about 1211.9252278444.

The spelling of 1780030640 in words is "one billion, seven hundred eighty million, thirty thousand, six hundred forty".