39981026340 has 36 divisors (see below), whose sum is σ = 121275780444. Its totient is φ = 10661606976.

The previous prime is 39981026329. The next prime is 39981026341. The reversal of 39981026340 is 4362018993.

It is a happy number.

39981026340 is a `hidden beast` number, since 3 + 9 + 9 + 8 + 1 + 0 + 2 + 634 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22200404004 + 17780622336 = 148998^2 + 133344^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (39981026341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111058227 + ... + 111058586.

It is an arithmetic number, because the mean of its divisors is an integer number (3368771679).

Almost surely, 2^39981026340 is an apocalyptic number.

39981026340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39981026340 is an abundant number, since it is smaller than the sum of its proper divisors (81294754104).

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

39981026340 is a wasteful number, since it uses less digits than its factorization.

39981026340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222116828 (or 222116823 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 39981026340 in words is "thirty-nine billion, nine hundred eighty-one million, twenty-six thousand, three hundred forty".