1687417398 has 24 divisors (see below), whose sum is σ = 3848496600. Its totient is φ = 532868544.

The previous prime is 1687417397. The next prime is 1687417447. The reversal of 1687417398 is 8937147861.

1687417398 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687417397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2466643 + ... + 2467326.

It is an arithmetic number, because the mean of its divisors is an integer number (160354025).

Almost surely, 2^1687417398 is an apocalyptic number.

1687417398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1687417398 is an abundant number, since it is smaller than the sum of its proper divisors (2161079202).

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

1687417398 is a wasteful number, since it uses less digits than its factorization.

1687417398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933996 (or 4933993 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 1687417398 is about 41078.1864010572. The cubic root of 1687417398 is about 1190.5313631034.

The spelling of 1687417398 in words is "one billion, six hundred eighty-seven million, four hundred seventeen thousand, three hundred ninety-eight".