699739648 has 40 divisors (see below), whose sum is σ = 1417878000. Its totient is φ = 344924160.

The previous prime is 699739639. The next prime is 699739687. The reversal of 699739648 is 846937996.

It is a super-3 number, since 3×699739648³ (a number of 28 digits) contains 333 as substring.

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, 26728 + ... + 45976.

It is an arithmetic number, because the mean of its divisors is an integer number (35446950).

Almost surely, 2^699739648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699739648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708939000).

699739648 is an abundant number, since it is smaller than the sum of its proper divisors (718138352).

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

699739648 is an equidigital number, since it uses as much as digits as its factorization.

699739648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19338 (or 19322 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 61.

The square root of 699739648 is about 26452.5924627436. The cubic root of 699739648 is about 887.7939082911.

The spelling of 699739648 in words is "six hundred ninety-nine million, seven hundred thirty-nine thousand, six hundred forty-eight".