39478477428 has 36 divisors (see below), whose sum is σ = 107469189828. Its totient is φ = 12147223680.

The previous prime is 39478477417. The next prime is 39478477429. The reversal of 39478477428 is 82477487493.

39478477428 is a `hidden beast` number, since 3 + 94 + 78 + 477 + 4 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24322897764 + 15155579664 = 155958^2 + 123108^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39478477429) 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, 42177393 + ... + 42178328.

It is an arithmetic number, because the mean of its divisors is an integer number (2985255273).

Almost surely, 2^39478477428 is an apocalyptic number.

It is an amenable number.

39478477428 is an abundant number, since it is smaller than the sum of its proper divisors (67990712400).

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

39478477428 is a wasteful number, since it uses less digits than its factorization.

39478477428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84355744 (or 84355739 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 63.

The spelling of 39478477428 in words is "thirty-nine billion, four hundred seventy-eight million, four hundred seventy-seven thousand, four hundred twenty-eight".