39428733940 has 24 divisors (see below), whose sum is σ = 86400357120. Its totient is φ = 15085776288.

The previous prime is 39428733931. The next prime is 39428733997. The reversal of 39428733940 is 4933782493.

It is a happy number.

It is a super-2 number, since 2×39428733940² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 42856860 + ... + 42857779.

It is an arithmetic number, because the mean of its divisors is an integer number (3600014880).

Almost surely, 2^39428733940 is an apocalyptic number.

It is an amenable number.

39428733940 is an abundant number, since it is smaller than the sum of its proper divisors (46971623180).

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

39428733940 is a wasteful number, since it uses less digits than its factorization.

39428733940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85714671 (or 85714669 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 39428733940 in words is "thirty-nine billion, four hundred twenty-eight million, seven hundred thirty-three thousand, nine hundred forty".