690464 has 12 divisors (see below), whose sum is σ = 1359414. Its totient is φ = 345216.

The previous prime is 690449. The next prime is 690467. The reversal of 690464 is 464096.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 211600 = 692^2 + 460^2 .

It is not an unprimeable number, because it can be changed into a prime (690467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10757 + ... + 10820.

2⁶⁹⁰⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

690464 is a deficient number, since it is larger than the sum of its proper divisors (668950).

690464 is a wasteful number, since it uses less digits than its factorization.

690464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21587 (or 21579 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 690464 is about 830.9416345328. The cubic root of 690464 is about 88.3853623314.

The spelling of 690464 in words is "six hundred ninety thousand, four hundred sixty-four".