438621446 has 8 divisors (see below), whose sum is σ = 660662904. Its totient is φ = 218400480.

The previous prime is 438621439. The next prime is 438621461. The reversal of 438621446 is 644126834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×438621446² = 384777545782261832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454520 + ... + 455483.

It is an arithmetic number, because the mean of its divisors is an integer number (82582863).

Almost surely, 2^438621446 is an apocalyptic number.

438621446 is a deficient number, since it is larger than the sum of its proper divisors (222041458).

438621446 is a wasteful number, since it uses less digits than its factorization.

438621446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910246.

The product of its digits is 110592, while the sum is 38.

The square root of 438621446 is about 20943.2911931244. The cubic root of 438621446 is about 759.7953315450.

The spelling of 438621446 in words is "four hundred thirty-eight million, six hundred twenty-one thousand, four hundred forty-six".