8126621438 has 8 divisors (see below), whose sum is σ = 13127619288. Its totient is φ = 3750748344.

The previous prime is 8126621389. The next prime is 8126621501. The reversal of 8126621438 is 8341266218.

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

It is a super-2 number, since 2×8126621438² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8126621395 and 8126621404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156281156 + ... + 156281207.

It is an arithmetic number, because the mean of its divisors is an integer number (1640952411).

Almost surely, 2^8126621438 is an apocalyptic number.

8126621438 is a deficient number, since it is larger than the sum of its proper divisors (5000997850).

8126621438 is a wasteful number, since it uses less digits than its factorization.

8126621438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312562378.

The product of its digits is 110592, while the sum is 41.

The square root of 8126621438 is about 90147.7755576919. The cubic root of 8126621438 is about 2010.4966008106.

The spelling of 8126621438 in words is "eight billion, one hundred twenty-six million, six hundred twenty-one thousand, four hundred thirty-eight".