39723945890 has 8 divisors (see below), whose sum is σ = 71503102620. Its totient is φ = 15889578352.

The previous prime is 39723945887. The next prime is 39723945893. The reversal of 39723945890 is 9854932793.

It is an interprime number because it is at equal distance from previous prime (39723945887) and next prime (39723945893).

It can be written as a sum of positive squares in 2 ways, for example, as 37949767249 + 1774178641 = 194807^2 + 42121^2 .

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 (39723945893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986197285 + ... + 1986197304.

Almost surely, 2^39723945890 is an apocalyptic number.

39723945890 is a deficient number, since it is larger than the sum of its proper divisors (31779156730).

39723945890 is a wasteful number, since it uses less digits than its factorization.

39723945890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972394596.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 39723945890 in words is "thirty-nine billion, seven hundred twenty-three million, nine hundred forty-five thousand, eight hundred ninety".