698644 has 12 divisors (see below), whose sum is σ = 1228500. Its totient is φ = 347648.

The previous prime is 698641. The next prime is 698653. The reversal of 698644 is 446896.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 407044 = 540^2 + 638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332 + ... + 1780.

It is an arithmetic number, because the mean of its divisors is an integer number (102375).

2⁶⁹⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

698644 is a deficient number, since it is larger than the sum of its proper divisors (529856).

698644 is a wasteful number, since it uses less digits than its factorization.

698644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 840 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 698644 is about 835.8492687082. The cubic root of 698644 is about 88.7330298837.

The spelling of 698644 in words is "six hundred ninety-eight thousand, six hundred forty-four".