1985010380 has 24 divisors (see below), whose sum is σ = 4170673248. Its totient is φ = 793594368.

The previous prime is 1985010359. The next prime is 1985010439. The reversal of 1985010380 is 830105891.

It is a self number, because there is not a number n which added to its sum of digits gives 1985010380.

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, 15737 + ... + 64943.

It is an arithmetic number, because the mean of its divisors is an integer number (173778052).

Almost surely, 2^1985010380 is an apocalyptic number.

1985010380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985010380 is an abundant number, since it is smaller than the sum of its proper divisors (2185662868).

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

1985010380 is a wasteful number, since it uses less digits than its factorization.

1985010380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51233 (or 51231 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1985010380 is about 44553.4553093248. The cubic root of 1985010380 is about 1256.7655304147.

The spelling of 1985010380 in words is "one billion, nine hundred eighty-five million, ten thousand, three hundred eighty".