690758944 has 12 divisors (see below), whose sum is σ = 1359931734. Its totient is φ = 345379456.

The previous prime is 690758921. The next prime is 690758947. The reversal of 690758944 is 449857096.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 605750544 + 85008400 = 24612^2 + 9220^2 .

It is a junction number, because it is equal to n+sod(n) for n = 690758891 and 690758900.

It is not an unprimeable number, because it can be changed into a prime (690758947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10793077 + ... + 10793140.

Almost surely, 2^690758944 is an apocalyptic number.

It is an amenable number.

690758944 is a deficient number, since it is larger than the sum of its proper divisors (669172790).

690758944 is a wasteful number, since it uses less digits than its factorization.

690758944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21586227 (or 21586219 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 690758944 is about 26282.2933550328. The cubic root of 690758944 is about 883.9794566727.

The spelling of 690758944 in words is "six hundred ninety million, seven hundred fifty-eight thousand, nine hundred forty-four".