634490 has 16 divisors (see below), whose sum is σ = 1160352. Its totient is φ = 249744.

The previous prime is 634483. The next prime is 634493. The reversal of 634490 is 94436.

It is not an unprimeable number, because it can be changed into a prime (634493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (72522).

2⁶³⁴⁴⁹⁰ is an apocalyptic number.

634490 is a deficient number, since it is larger than the sum of its proper divisors (525862).

634490 is a wasteful number, since it uses less digits than its factorization.

634490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 634490 is about 796.5488057866. The cubic root of 634490 is about 85.9293633068.

The spelling of 634490 in words is "six hundred thirty-four thousand, four hundred ninety".