438364890 has 48 divisors (see below), whose sum is σ = 1206796968. Its totient is φ = 110020608.

The previous prime is 438364879. The next prime is 438364909. The reversal of 438364890 is 98463834.

It can be written as a sum of positive squares in 4 ways, for example, as 305585361 + 132779529 = 17481^2 + 11523^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141727 + ... + 144786.

Almost surely, 2^438364890 is an apocalyptic number.

438364890 is an abundant number, since it is smaller than the sum of its proper divisors (768432078).

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

438364890 is a wasteful number, since it uses less digits than its factorization.

438364890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286543 (or 286540 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 438364890 is about 20937.1652809066. The cubic root of 438364890 is about 759.6471642427.

The spelling of 438364890 in words is "four hundred thirty-eight million, three hundred sixty-four thousand, eight hundred ninety".