1780990852 has 12 divisors (see below), whose sum is σ = 3156186880. Its totient is φ = 879223176.

The previous prime is 1780990829. The next prime is 1780990867. The reversal of 1780990852 is 2580990871.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1780990796 and 1780990805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817708 + ... + 2818339.

Almost surely, 2^1780990852 is an apocalyptic number.

It is an amenable number.

1780990852 is a deficient number, since it is larger than the sum of its proper divisors (1375196028).

1780990852 is a wasteful number, since it uses less digits than its factorization.

1780990852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636130 (or 5636128 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 1780990852 is about 42201.7873081224. The cubic root of 1780990852 is about 1212.1431072328.

The spelling of 1780990852 in words is "one billion, seven hundred eighty million, nine hundred ninety thousand, eight hundred fifty-two".