6439698000 has 240 divisors, whose sum is σ = 22671709632. Its totient is φ = 1703520000.

The previous prime is 6439697989. The next prime is 6439698053. The reversal of 6439698000 is 8969346.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2356635 + ... + 2359365.

Almost surely, 2^6439698000 is an apocalyptic number.

6439698000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6439698000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11335854816).

6439698000 is an abundant number, since it is smaller than the sum of its proper divisors (16232011632).

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

6439698000 is a wasteful number, since it uses less digits than its factorization.

6439698000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 6439698000 is about 80247.7289398273. The cubic root of 6439698000 is about 1860.4664109560.

The spelling of 6439698000 in words is "six billion, four hundred thirty-nine million, six hundred ninety-eight thousand".