1780484940 has 72 divisors (see below), whose sum is σ = 5816258448. Its totient is φ = 438272640.

The previous prime is 1780484933. The next prime is 1780484989. The reversal of 1780484940 is 494840871.

1780484940 is a `hidden beast` number, since 1 + 7 + 80 + 484 + 94 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378106 + ... + 382785.

Almost surely, 2^1780484940 is an apocalyptic number.

1780484940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780484940 is an abundant number, since it is smaller than the sum of its proper divisors (4035773508).

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

1780484940 is a wasteful number, since it uses less digits than its factorization.

1780484940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760919 (or 760914 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1780484940 is about 42195.7929182519. The cubic root of 1780484940 is about 1212.0283217249.

The spelling of 1780484940 in words is "one billion, seven hundred eighty million, four hundred eighty-four thousand, nine hundred forty".