39690793890 has 144 divisors (see below), whose sum is σ = 117090425088. Its totient is φ = 9311544000.

The previous prime is 39690793853. The next prime is 39690793913. The reversal of 39690793890 is 9839709693.

39690793890 is a `hidden beast` number, since 396 + 90 + 79 + 3 + 8 + 90 = 666.

39690793890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39690793890² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 278805 + ... + 396375.

It is an arithmetic number, because the mean of its divisors is an integer number (813127952).

Almost surely, 2^39690793890 is an apocalyptic number.

39690793890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39690793890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58545212544).

39690793890 is an abundant number, since it is smaller than the sum of its proper divisors (77399631198).

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

39690793890 is a wasteful number, since it uses less digits than its factorization.

39690793890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117637 (or 117623 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 63.

The spelling of 39690793890 in words is "thirty-nine billion, six hundred ninety million, seven hundred ninety-three thousand, eight hundred ninety".