1985223902 has 4 divisors (see below), whose sum is σ = 2977835856. Its totient is φ = 992611950.

The previous prime is 1985223901. The next prime is 1985223907. The reversal of 1985223902 is 2093225891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2093225891 = 457 ⋅4580363.

It is a super-2 number, since 2×1985223902² = 7882227882144211208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1985223902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985223901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496305974 + ... + 496305977.

It is an arithmetic number, because the mean of its divisors is an integer number (744458964).

Almost surely, 2^1985223902 is an apocalyptic number.

1985223902 is a deficient number, since it is larger than the sum of its proper divisors (992611954).

1985223902 is an equidigital number, since it uses as much as digits as its factorization.

1985223902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992611953.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1985223902 is about 44555.8514900119. The cubic root of 1985223902 is about 1256.8105910469.

The spelling of 1985223902 in words is "one billion, nine hundred eighty-five million, two hundred twenty-three thousand, nine hundred two".