39423639 has 8 divisors (see below), whose sum is σ = 52606720. Its totient is φ = 26261496.

The previous prime is 39423619. The next prime is 39423653. The reversal of 39423639 is 93632493.

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

It is not a de Polignac number, because 39423639 - 2⁷ = 39423511 is a prime.

It is a super-3 number, since 3×39423639³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39423597 and 39423606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39423619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127 + ... + 8880.

It is an arithmetic number, because the mean of its divisors is an integer number (6575840).

Almost surely, 2^39423639 is an apocalyptic number.

39423639 is a deficient number, since it is larger than the sum of its proper divisors (13183081).

39423639 is a wasteful number, since it uses less digits than its factorization.

39423639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10469.

The product of its digits is 104976, while the sum is 39.

The square root of 39423639 is about 6278.8246511588. The cubic root of 39423639 is about 340.3446303736.

The spelling of 39423639 in words is "thirty-nine million, four hundred twenty-three thousand, six hundred thirty-nine".