634620 has 48 divisors (see below), whose sum is σ = 2032128. Its totient is φ = 144960.

The previous prime is 634609. The next prime is 634643. The reversal of 634620 is 26436.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

634620 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2⁶³⁴⁶²⁰ is an apocalyptic number.

634620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634620 is an abundant number, since it is smaller than the sum of its proper divisors (1397508).

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

634620 is a wasteful number, since it uses less digits than its factorization.

634620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 634620 is about 796.6304036377. The cubic root of 634620 is about 85.9352315655.

The spelling of 634620 in words is "six hundred thirty-four thousand, six hundred twenty".