690165396 has 36 divisors (see below), whose sum is σ = 1745452800. Its totient is φ = 229940688.

The previous prime is 690165391. The next prime is 690165449. The reversal of 690165396 is 693561096.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690165391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100315 + ... + 106973.

It is an arithmetic number, because the mean of its divisors is an integer number (48484800).

Almost surely, 2^690165396 is an apocalyptic number.

It is an amenable number.

690165396 is an abundant number, since it is smaller than the sum of its proper divisors (1055287404).

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

690165396 is a wasteful number, since it uses less digits than its factorization.

690165396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548 (or 9543 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 690165396 is about 26270.9991435423. Note that the first 3 decimals coincide. The cubic root of 690165396 is about 883.7261919621.

Adding to 690165396 its sum of digits (45), we get a square (690165441 = 26271²).

It can be divided in two parts, 690165 and 396, that added together give a square (690561 = 831²).

The spelling of 690165396 in words is "six hundred ninety million, one hundred sixty-five thousand, three hundred ninety-six".