1784972020 has 24 divisors (see below), whose sum is σ = 4036783464. Its totient is φ = 659066496.

The previous prime is 1784972009. The next prime is 1784972039. The reversal of 1784972020 is 202794871.

It can be written as a sum of positive squares in 4 ways, for example, as 136936804 + 1648035216 = 11702^2 + 40596^2 .

It is a super-2 number, since 2×1784972020² = 6372250224365760800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3432379 + ... + 3432898.

It is an arithmetic number, because the mean of its divisors is an integer number (168199311).

Almost surely, 2^1784972020 is an apocalyptic number.

1784972020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1784972020 is an abundant number, since it is smaller than the sum of its proper divisors (2251811444).

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

1784972020 is a wasteful number, since it uses less digits than its factorization.

1784972020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865299 (or 6865297 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1784972020 is about 42248.9292172003. The cubic root of 1784972020 is about 1213.0456299367.

The spelling of 1784972020 in words is "one billion, seven hundred eighty-four million, nine hundred seventy-two thousand, twenty".