1987403198 has 8 divisors (see below), whose sum is σ = 3252114360. Its totient is φ = 903365080.

The previous prime is 1987403189. The next prime is 1987403233. The reversal of 1987403198 is 8913047891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45168233 + ... + 45168276.

It is an arithmetic number, because the mean of its divisors is an integer number (406514295).

Almost surely, 2^1987403198 is an apocalyptic number.

1987403198 is a deficient number, since it is larger than the sum of its proper divisors (1264711162).

1987403198 is a wasteful number, since it uses less digits than its factorization.

1987403198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90336522.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1987403198 is about 44580.3005597764. The cubic root of 1987403198 is about 1257.2703142822.

The spelling of 1987403198 in words is "one billion, nine hundred eighty-seven million, four hundred three thousand, one hundred ninety-eight".