690561102 has 64 divisors (see below), whose sum is σ = 1726272000. Its totient is φ = 178913280.

The previous prime is 690561089. The next prime is 690561127. The reversal of 690561102 is 201165096.

It is a self number, because there is not a number n which added to its sum of digits gives 690561102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205774 + ... + 209102.

It is an arithmetic number, because the mean of its divisors is an integer number (26973000).

Almost surely, 2^690561102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690561102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863136000).

690561102 is an abundant number, since it is smaller than the sum of its proper divisors (1035710898).

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

690561102 is a wasteful number, since it uses less digits than its factorization.

690561102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 690561102 is about 26278.5292967472. The cubic root of 690561102 is about 883.8950543571.

The spelling of 690561102 in words is "six hundred ninety million, five hundred sixty-one thousand, one hundred two".