39890312 has 108 divisors (see below), whose sum is σ = 99045765. Its totient is φ = 15005760.

The previous prime is 39890309. The next prime is 39890317. The reversal of 39890312 is 21309893.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 39866596 + 23716 = 6314^2 + 154^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4466.

It is not an unprimeable number, because it can be changed into a prime (39890317) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1375514 + ... + 1375542.

Almost surely, 2^39890312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39890312

39890312 is an abundant number, since it is smaller than the sum of its proper divisors (59155453).

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

39890312 is a wasteful number, since it uses less digits than its factorization.

39890312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 39890312 is about 6315.8777695582. The cubic root of 39890312 is about 341.6822967534.

The spelling of 39890312 in words is "thirty-nine million, eight hundred ninety thousand, three hundred twelve".