1967998390 has 16 divisors (see below), whose sum is σ = 3543480720. Its totient is φ = 786958560.

The previous prime is 1967998367. The next prime is 1967998399. The reversal of 1967998390 is 938997691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1967998399) 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 in 7 ways as a sum of consecutive naturals, for example, 6325 + ... + 63055.

It is an arithmetic number, because the mean of its divisors is an integer number (221467545).

Almost surely, 2^1967998390 is an apocalyptic number.

1967998390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1967998390 is a deficient number, since it is larger than the sum of its proper divisors (1575482330).

1967998390 is a wasteful number, since it uses less digits than its factorization.

1967998390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60207.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The square root of 1967998390 is about 44362.1278795326. The cubic root of 1967998390 is about 1253.1649694778.

The spelling of 1967998390 in words is "one billion, nine hundred sixty-seven million, nine hundred ninety-eight thousand, three hundred ninety".