219734634 has 64 divisors (see below), whose sum is σ = 525975552. Its totient is φ = 59875200.

The previous prime is 219734633. The next prime is 219734657. The reversal of 219734634 is 436437912.

It is a super-2 number, since 2×219734634² = 96566618758227912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 219734592 and 219734601.

It is not an unprimeable number, because it can be changed into a prime (219734633) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 91254 + ... + 93630.

It is an arithmetic number, because the mean of its divisors is an integer number (8218368).

Almost surely, 2^219734634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219734634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262987776).

219734634 is an abundant number, since it is smaller than the sum of its proper divisors (306240918).

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

219734634 is a wasteful number, since it uses less digits than its factorization.

219734634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its digits is 108864, while the sum is 39.

The square root of 219734634 is about 14823.4487889964. The cubic root of 219734634 is about 603.4382541569.

The spelling of 219734634 in words is "two hundred nineteen million, seven hundred thirty-four thousand, six hundred thirty-four".