8378545389 has 8 divisors (see below), whose sum is σ = 11178735072. Its totient is φ = 5582026320.

The previous prime is 8378545379. The next prime is 8378545433. The reversal of 8378545389 is 9835458738.

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

It is not a de Polignac number, because 8378545389 - 2²¹ = 8376448237 is a prime.

It is a super-2 number, since 2×8378545389² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378545379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912322 + ... + 921459.

It is an arithmetic number, because the mean of its divisors is an integer number (1397341884).

Almost surely, 2^8378545389 is an apocalyptic number.

It is an amenable number.

8378545389 is a deficient number, since it is larger than the sum of its proper divisors (2800189683).

8378545389 is a wasteful number, since it uses less digits than its factorization.

8378545389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835307.

The product of its digits is 29030400, while the sum is 60.

The square root of 8378545389 is about 91534.3945683807. The cubic root of 8378545389 is about 2031.0605723419.

The spelling of 8378545389 in words is "eight billion, three hundred seventy-eight million, five hundred forty-five thousand, three hundred eighty-nine".