1998782310 has 64 divisors (see below), whose sum is σ = 5804877312. Its totient is φ = 429989376.

The previous prime is 1998782309. The next prime is 1998782333. The reversal of 1998782310 is 132878991.

It is a super-2 number, since 2×1998782310² = 7990261445537872200, which contains 22 as substring.

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1998782310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276372 + ... + 283511.

It is an arithmetic number, because the mean of its divisors is an integer number (90701208).

Almost surely, 2^1998782310 is an apocalyptic number.

1998782310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998782310 is an abundant number, since it is smaller than the sum of its proper divisors (3806095002).

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

1998782310 is a wasteful number, since it uses less digits than its factorization.

1998782310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559917.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 1998782310 is about 44707.7432890545. The cubic root of 1998782310 is about 1259.6652991064.

The spelling of 1998782310 in words is "one billion, nine hundred ninety-eight million, seven hundred eighty-two thousand, three hundred ten".