1998377472 has 480 divisors, whose sum is σ = 7185290112. Its totient is φ = 478937088.

The previous prime is 1998377467. The next prime is 1998377477. The reversal of 1998377472 is 2747738991.

It is an interprime number because it is at equal distance from previous prime (1998377467) and next prime (1998377477).

It is a super-2 number, since 2×1998377472² = 7987025041194221568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1998377477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68909554 + ... + 68909582.

Almost surely, 2^1998377472 is an apocalyptic number.

1998377472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998377472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3592645056).

1998377472 is an abundant number, since it is smaller than the sum of its proper divisors (5186912640).

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

1998377472 is a wasteful number, since it uses less digits than its factorization.

1998377472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 71 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 57.

The square root of 1998377472 is about 44703.2154548194. The cubic root of 1998377472 is about 1259.5802481880.

The spelling of 1998377472 in words is "one billion, nine hundred ninety-eight million, three hundred seventy-seven thousand, four hundred seventy-two".