39900338478 has 384 divisors, whose sum is σ = 128324528640. Its totient is φ = 9002327040.

The previous prime is 39900338477. The next prime is 39900338537. The reversal of 39900338478 is 87483300993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39900338473) 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 191 ways as a sum of consecutive naturals, for example, 6429325 + ... + 6435527.

It is an arithmetic number, because the mean of its divisors is an integer number (334178460).

Almost surely, 2^39900338478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39900338478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64162264320).

39900338478 is an abundant number, since it is smaller than the sum of its proper divisors (88424190162).

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

39900338478 is a wasteful number, since it uses less digits than its factorization.

39900338478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269 (or 6256 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 39900338478 in words is "thirty-nine billion, nine hundred million, three hundred thirty-eight thousand, four hundred seventy-eight".