1998377853 has 8 divisors (see below), whose sum is σ = 2668307616. Its totient is φ = 1330350000.

The previous prime is 1998377851. The next prime is 1998377867. The reversal of 1998377853 is 3587738991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1998377853 - 2¹ = 1998377851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998377851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473023 + ... + 477228.

It is an arithmetic number, because the mean of its divisors is an integer number (333538452).

Almost surely, 2^1998377853 is an apocalyptic number.

It is an amenable number.

1998377853 is a deficient number, since it is larger than the sum of its proper divisors (669929763).

1998377853 is an equidigital number, since it uses as much as digits as its factorization.

1998377853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950955.

The product of its digits is 11430720, while the sum is 60.

The square root of 1998377853 is about 44703.2197162576. The cubic root of 1998377853 is about 1259.5803282363.

It can be divided in two parts, 199837 and 7853, that added together give a triangular number (207690 = T₆₄₄).

The spelling of 1998377853 in words is "one billion, nine hundred ninety-eight million, three hundred seventy-seven thousand, eight hundred fifty-three".