39845147890 has 8 divisors (see below), whose sum is σ = 71721266220. Its totient is φ = 15938059152.

The previous prime is 39845147887. The next prime is 39845147897. The reversal of 39845147890 is 9874154893.

It can be written as a sum of positive squares in 2 ways, for example, as 35981157969 + 3863989921 = 189687^2 + 62161^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39845147897) by changing a digit.

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, 1992257385 + ... + 1992257404.

Almost surely, 2^39845147890 is an apocalyptic number.

39845147890 is a deficient number, since it is larger than the sum of its proper divisors (31876118330).

39845147890 is a wasteful number, since it uses less digits than its factorization.

39845147890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984514796.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 39845147890 in words is "thirty-nine billion, eight hundred forty-five million, one hundred forty-seven thousand, eight hundred ninety".