8378890506 has 64 divisors (see below), whose sum is σ = 21571296000. Its totient is φ = 2361166848.

The previous prime is 8378890477. The next prime is 8378890523. The reversal of 8378890506 is 6050988738.

It is a happy number.

It is a super-2 number, since 2×8378890506² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 124231 + ... + 179418.

It is an arithmetic number, because the mean of its divisors is an integer number (337051500).

Almost surely, 2^8378890506 is an apocalyptic number.

8378890506 is an abundant number, since it is smaller than the sum of its proper divisors (13192405494).

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

8378890506 is a wasteful number, since it uses less digits than its factorization.

8378890506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303740 (or 303734 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 8378890506 is about 91536.2797255820. The cubic root of 8378890506 is about 2031.0884588017.

The spelling of 8378890506 in words is "eight billion, three hundred seventy-eight million, eight hundred ninety thousand, five hundred six".