38405250987 has 8 divisors (see below), whose sum is σ = 54219177936. Its totient is φ = 24097412352.

The previous prime is 38405250959. The next prime is 38405251013. The reversal of 38405250987 is 78905250483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38405250987 - 2¹⁰ = 38405249963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 753044137 = 38405250987 / (3 + 8 + 4 + 0 + 5 + 2 + 5 + 0 + 9 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (38403250987) 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 7 ways as a sum of consecutive naturals, for example, 376522018 + ... + 376522119.

It is an arithmetic number, because the mean of its divisors is an integer number (6777397242).

Almost surely, 2^38405250987 is an apocalyptic number.

38405250987 is a deficient number, since it is larger than the sum of its proper divisors (15813926949).

38405250987 is a wasteful number, since it uses less digits than its factorization.

38405250987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753044157.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 38405250987 in words is "thirty-eight billion, four hundred five million, two hundred fifty thousand, nine hundred eighty-seven".