634235478 has 32 divisors (see below), whose sum is σ = 1312077312. Its totient is φ = 204244800.

The previous prime is 634235477. The next prime is 634235489. The reversal of 634235478 is 874532436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634235477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12823 + ... + 37853.

It is an arithmetic number, because the mean of its divisors is an integer number (41002416).

Almost surely, 2^634235478 is an apocalyptic number.

634235478 is an abundant number, since it is smaller than the sum of its proper divisors (677841834).

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

634235478 is a wasteful number, since it uses less digits than its factorization.

634235478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25180.

The product of its digits is 483840, while the sum is 42.

The square root of 634235478 is about 25184.0322029654. The cubic root of 634235478 is about 859.1787174739.

The spelling of 634235478 in words is "six hundred thirty-four million, two hundred thirty-five thousand, four hundred seventy-eight".