39428158621 has 4 divisors (see below), whose sum is σ = 39615022144. Its totient is φ = 39241295100.

The previous prime is 39428158607. The next prime is 39428158657. The reversal of 39428158621 is 12685182493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39428158621 - 2⁷ = 39428158493 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 (39428158661) 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 3 ways as a sum of consecutive naturals, for example, 93431445 + ... + 93431866.

It is an arithmetic number, because the mean of its divisors is an integer number (9903755536).

Almost surely, 2^39428158621 is an apocalyptic number.

It is an amenable number.

39428158621 is a deficient number, since it is larger than the sum of its proper divisors (186863523).

39428158621 is a wasteful number, since it uses less digits than its factorization.

39428158621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186863522.

The product of its digits is 829440, while the sum is 49.

The spelling of 39428158621 in words is "thirty-nine billion, four hundred twenty-eight million, one hundred fifty-eight thousand, six hundred twenty-one".