438204690 has 192 divisors, whose sum is σ = 1459710720. Its totient is φ = 88542720.

The previous prime is 438204677. The next prime is 438204713. The reversal of 438204690 is 96402834.

It is a happy number.

It is a super-2 number, since 2×438204690² = 384046700675992200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 255556 + ... + 257264.

It is an arithmetic number, because the mean of its divisors is an integer number (7602660).

Almost surely, 2^438204690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438204690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729855360).

438204690 is an abundant number, since it is smaller than the sum of its proper divisors (1021506030).

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

438204690 is a wasteful number, since it uses less digits than its factorization.

438204690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 438204690 is about 20933.3391985130. The cubic root of 438204690 is about 759.5546155418.

The spelling of 438204690 in words is "four hundred thirty-eight million, two hundred four thousand, six hundred ninety".