690889122 has 128 divisors (see below), whose sum is σ = 1953792000. Its totient is φ = 179398800.

The previous prime is 690889117. The next prime is 690889139. The reversal of 690889122 is 221988096.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 202047 + ... + 205437.

It is an arithmetic number, because the mean of its divisors is an integer number (15264000).

Almost surely, 2^690889122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690889122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976896000).

690889122 is an abundant number, since it is smaller than the sum of its proper divisors (1262902878).

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

690889122 is a wasteful number, since it uses less digits than its factorization.

690889122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 690889122 is about 26284.7697726269. The cubic root of 690889122 is about 884.0349837373.

It can be divided in two parts, 69088 and 9122, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 690889122 in words is "six hundred ninety million, eight hundred eighty-nine thousand, one hundred twenty-two".