704538 has 20 divisors (see below), whose sum is σ = 1579050. Its totient is φ = 234792.

The previous prime is 704527. The next prime is 704549. The reversal of 704538 is 835407.

It is an interprime number because it is at equal distance from previous prime (704527) and next prime (704549).

It can be written as a sum of positive squares in only one way, i.e., 700569 + 3969 = 837^2 + 63^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is an unprimeable number.

704538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2013 + ... + 2336.

2⁷⁰⁴⁵³⁸ is an apocalyptic number.

704538 is an abundant number, since it is smaller than the sum of its proper divisors (874512).

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

704538 is a wasteful number, since it uses less digits than its factorization.

704538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363 (or 4354 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 704538 is about 839.3676191038. The cubic root of 704538 is about 88.9818588619.

The spelling of 704538 in words is "seven hundred four thousand, five hundred thirty-eight".