634542216 has 128 divisors (see below), whose sum is σ = 2063923200. Its totient is φ = 157639680.

The previous prime is 634542179. The next prime is 634542241. The reversal of 634542216 is 612245436.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35040 + ... + 49968.

It is an arithmetic number, because the mean of its divisors is an integer number (16124400).

Almost surely, 2^634542216 is an apocalyptic number.

634542216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634542216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031961600).

634542216 is an abundant number, since it is smaller than the sum of its proper divisors (1429380984).

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

634542216 is a wasteful number, since it uses less digits than its factorization.

634542216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14979 (or 14975 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 634542216 is about 25190.1213970874. The cubic root of 634542216 is about 859.3172045689.

The spelling of 634542216 in words is "six hundred thirty-four million, five hundred forty-two thousand, two hundred sixteen".