438589890 has 40 divisors (see below), whose sum is σ = 1179321660. Its totient is φ = 116957088.

The previous prime is 438589883. The next prime is 438589937. The reversal of 438589890 is 98985834.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 378263601 + 60326289 = 19449^2 + 7767^2 .

It is a super-2 number, since 2×438589890² = 384722183220424200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 269925 + ... + 271544.

Almost surely, 2^438589890 is an apocalyptic number.

438589890 is an abundant number, since it is smaller than the sum of its proper divisors (740731770).

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

438589890 is a wasteful number, since it uses less digits than its factorization.

438589890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541488 (or 541479 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 438589890 is about 20942.5378118317. The cubic root of 438589890 is about 759.7771103076. Note that the first 3 decimals are identical.

The spelling of 438589890 in words is "four hundred thirty-eight million, five hundred eighty-nine thousand, eight hundred ninety".