634870 has 8 divisors (see below), whose sum is σ = 1142784. Its totient is φ = 253944.

The previous prime is 634861. The next prime is 634871. The reversal of 634870 is 78436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634871) 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, 31734 + ... + 31753.

It is an arithmetic number, because the mean of its divisors is an integer number (142848).

2⁶³⁴⁸⁷⁰ is an apocalyptic number.

634870 is a deficient number, since it is larger than the sum of its proper divisors (507914).

634870 is a wasteful number, since it uses less digits than its factorization.

634870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63494.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 634870 is about 796.7872990956. The cubic root of 634870 is about 85.9465144263.

The spelling of 634870 in words is "six hundred thirty-four thousand, eight hundred seventy".