690617412 has 72 divisors (see below), whose sum is σ = 1825649280. Its totient is φ = 219711360.

The previous prime is 690617387. The next prime is 690617423. The reversal of 690617412 is 214716096.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669337 + ... + 670367.

It is an arithmetic number, because the mean of its divisors is an integer number (25356240).

Almost surely, 2^690617412 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 690617412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912824640).

690617412 is an abundant number, since it is smaller than the sum of its proper divisors (1135031868).

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

690617412 is a wasteful number, since it uses less digits than its factorization.

690617412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 690617412 is about 26279.6006818977. The cubic root of 690617412 is about 883.9190786747.

It can be divided in two parts, 6906174 and 12, that added together give a triangular number (6906186 = T₃₇₁₆).

The spelling of 690617412 in words is "six hundred ninety million, six hundred seventeen thousand, four hundred twelve".