1981386710 has 16 divisors (see below), whose sum is σ = 3568428000. Its totient is φ = 792125376.

The previous prime is 1981386677. The next prime is 1981386713. The reversal of 1981386710 is 176831891.

It is a super-3 number, since 3×1981386710³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981386713) 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, 33935 + ... + 71514.

It is an arithmetic number, because the mean of its divisors is an integer number (223026750).

Almost surely, 2^1981386710 is an apocalyptic number.

1981386710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1981386710 is a deficient number, since it is larger than the sum of its proper divisors (1587041290).

1981386710 is a wasteful number, since it uses less digits than its factorization.

1981386710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107335.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1981386710 is about 44512.7701901376. The cubic root of 1981386710 is about 1256.0003156821. Note that the first 3 decimals are identical.

The spelling of 1981386710 in words is "one billion, nine hundred eighty-one million, three hundred eighty-six thousand, seven hundred ten".