690817448 has 8 divisors (see below), whose sum is σ = 1295282730. Its totient is φ = 345408720.

The previous prime is 690817441. The next prime is 690817493. The reversal of 690817448 is 844718096.

It can be written as a sum of positive squares in only one way, i.e., 460445764 + 230371684 = 21458^2 + 15178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×690817448² = 954457492922465408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690817441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43176083 + ... + 43176098.

Almost surely, 2^690817448 is an apocalyptic number.

It is an amenable number.

690817448 is a deficient number, since it is larger than the sum of its proper divisors (604465282).

690817448 is a wasteful number, since it uses less digits than its factorization.

690817448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86352187 (or 86352183 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 690817448 is about 26283.4063241430. The cubic root of 690817448 is about 884.0044122545.

The spelling of 690817448 in words is "six hundred ninety million, eight hundred seventeen thousand, four hundred forty-eight".