8420815403438 has 8 divisors (see below), whose sum is σ = 12639222617880. Its totient is φ = 4207741197480.

The previous prime is 8420815403419. The next prime is 8420815403491. The reversal of 8420815403438 is 8343045180248.

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

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, 1333248173 + ... + 1333254488.

It is an arithmetic number, because the mean of its divisors is an integer number (1579902827235).

Almost surely, 2^{8420815403438} is an apocalyptic number.

8420815403438 is a deficient number, since it is larger than the sum of its proper divisors (4218407214442).

8420815403438 is a wasteful number, since it uses less digits than its factorization.

8420815403438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666504242.

The product of its (nonzero) digits is 2949120, while the sum is 50.

The spelling of 8420815403438 in words is "eight trillion, four hundred twenty billion, eight hundred fifteen million, four hundred three thousand, four hundred thirty-eight".