438145938898 has 4 divisors (see below), whose sum is σ = 657218908350. Its totient is φ = 219072969448.

The previous prime is 438145938889. The next prime is 438145938907. The reversal of 438145938898 is 898839541834.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (438145938889) and next prime (438145938907).

It can be written as a sum of positive squares in only one way, i.e., 428609830489 + 9536108409 = 654683^2 + 97653^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109536484723 + ... + 109536484726.

Almost surely, 2^438145938898 is an apocalyptic number.

438145938898 is a deficient number, since it is larger than the sum of its proper divisors (219072969452).

438145938898 is a wasteful number, since it uses less digits than its factorization.

438145938898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219072969451.

The product of its digits is 238878720, while the sum is 70.

The spelling of 438145938898 in words is "four hundred thirty-eight billion, one hundred forty-five million, nine hundred thirty-eight thousand, eight hundred ninety-eight".