699030144 has 144 divisors (see below), whose sum is σ = 2068818570. Its totient is φ = 226477056.

The previous prime is 699030139. The next prime is 699030149. The reversal of 699030144 is 441030996.

It is an interprime number because it is at equal distance from previous prime (699030139) and next prime (699030149).

It can be written as a sum of positive squares in only one way, i.e., 534164544 + 164865600 = 23112^2 + 12840^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 699030099 and 699030108.

It is not an unprimeable number, because it can be changed into a prime (699030149) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6532939 + ... + 6533045.

Almost surely, 2^699030144 is an apocalyptic number.

699030144 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 699030144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034409285).

699030144 is an abundant number, since it is smaller than the sum of its proper divisors (1369788426).

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

699030144 is a wasteful number, since it uses less digits than its factorization.

699030144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 699030144 is about 26439.1782020546. The cubic root of 699030144 is about 887.4937460116.

The spelling of 699030144 in words is "six hundred ninety-nine million, thirty thousand, one hundred forty-four".