438620994 has 160 divisors (see below), whose sum is σ = 1194310656. Its totient is φ = 117612000.

The previous prime is 438620989. The next prime is 438620999. The reversal of 438620994 is 499026834.

438620994 is a `hidden beast` number, since 438 + 6 + 209 + 9 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (438620989) and next prime (438620999).

It is not an unprimeable number, because it can be changed into a prime (438620999) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1747369 + ... + 1747619.

Almost surely, 2^438620994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438620994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597155328).

438620994 is an abundant number, since it is smaller than the sum of its proper divisors (755689662).

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

438620994 is a wasteful number, since it uses less digits than its factorization.

438620994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 438620994 is about 20943.2804020765. The cubic root of 438620994 is about 759.7950705549.

The spelling of 438620994 in words is "four hundred thirty-eight million, six hundred twenty thousand, nine hundred ninety-four".