126891438 has 8 divisors (see below), whose sum is σ = 253782888. Its totient is φ = 42297144.

The previous prime is 126891431. The next prime is 126891439. The reversal of 126891438 is 834198621.

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

126891438 is an admirable number.

It is a super-2 number, since 2×126891438² = 32202874075415688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126891438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126891431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10574281 + ... + 10574292.

It is an arithmetic number, because the mean of its divisors is an integer number (31722861).

Almost surely, 2^126891438 is an apocalyptic number.

126891438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

126891438 is a wasteful number, since it uses less digits than its factorization.

126891438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148578.

The product of its digits is 82944, while the sum is 42.

The square root of 126891438 is about 11264.6099799327. The cubic root of 126891438 is about 502.5093030628.

The spelling of 126891438 in words is "one hundred twenty-six million, eight hundred ninety-one thousand, four hundred thirty-eight".