699970944 has 128 divisors (see below), whose sum is σ = 1971129600. Its totient is φ = 219469824.

The previous prime is 699970933. The next prime is 699970951. The reversal of 699970944 is 449079996.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×699970944² = 979918644888502272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1437069 + ... + 1437555.

It is an arithmetic number, because the mean of its divisors is an integer number (15399450).

Almost surely, 2^699970944 is an apocalyptic number.

699970944 is a gapful number since it is divisible by the number (64) 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 699970944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985564800).

699970944 is an abundant number, since it is smaller than the sum of its proper divisors (1271158656).

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

699970944 is a wasteful number, since it uses less digits than its factorization.

699970944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 57.

The square root of 699970944 is about 26456.9639981612. The cubic root of 699970944 is about 887.8917163637.

The spelling of 699970944 in words is "six hundred ninety-nine million, nine hundred seventy thousand, nine hundred forty-four".