38870047477 has 4 divisors (see below), whose sum is σ = 41156520876. Its totient is φ = 36583574080.

The previous prime is 38870047471. The next prime is 38870047507. The reversal of 38870047477 is 77474007883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11528102161 + 27341945316 = 107369^2 + 165354^2 .

It is a cyclic number.

It is not a de Polignac number, because 38870047477 - 2¹¹ = 38870045429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38870047471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143236674 + ... + 1143236707.

It is an arithmetic number, because the mean of its divisors is an integer number (10289130219).

Almost surely, 2^38870047477 is an apocalyptic number.

It is an amenable number.

38870047477 is a deficient number, since it is larger than the sum of its proper divisors (2286473399).

38870047477 is a wasteful number, since it uses less digits than its factorization.

38870047477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286473398.

The product of its (nonzero) digits is 7375872, while the sum is 55.

The spelling of 38870047477 in words is "thirty-eight billion, eight hundred seventy million, forty-seven thousand, four hundred seventy-seven".