699694128 has 180 divisors, whose sum is σ = 2322092448. Its totient is φ = 196035840.

The previous prime is 699694117. The next prime is 699694139. The reversal of 699694128 is 821496996.

It is an interprime number because it is at equal distance from previous prime (699694117) and next prime (699694139).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 373033 + ... + 374903.

Almost surely, 2^699694128 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 699694128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161046224).

699694128 is an abundant number, since it is smaller than the sum of its proper divisors (1622398320).

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

699694128 is a wasteful number, since it uses less digits than its factorization.

699694128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952 (or 1936 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 699694128 is about 26451.7320415885. The cubic root of 699694128 is about 887.7746567237.

It can be divided in two parts, 6996 and 94128, that added together give a square (101124 = 318²).

The spelling of 699694128 in words is "six hundred ninety-nine million, six hundred ninety-four thousand, one hundred twenty-eight".