126380638 has 4 divisors (see below), whose sum is σ = 189570960. Its totient is φ = 63190318.

The previous prime is 126380633. The next prime is 126380659. The reversal of 126380638 is 836083621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836083621 = 607 ⋅1377403.

It is a super-2 number, since 2×126380638² = 31944131322574088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126380597 and 126380606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126380633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31595158 + ... + 31595161.

It is an arithmetic number, because the mean of its divisors is an integer number (47392740).

Almost surely, 2^126380638 is an apocalyptic number.

126380638 is a deficient number, since it is larger than the sum of its proper divisors (63190322).

126380638 is an equidigital number, since it uses as much as digits as its factorization.

126380638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63190321.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 126380638 is about 11241.9143387592. The cubic root of 126380638 is about 501.8341144882.

The spelling of 126380638 in words is "one hundred twenty-six million, three hundred eighty thousand, six hundred thirty-eight".