39662421 has 8 divisors (see below), whose sum is σ = 53053440. Its totient is φ = 26356512.

The previous prime is 39662387. The next prime is 39662429. The reversal of 39662421 is 12426693.

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

It is not a de Polignac number, because 39662421 - 2¹⁹ = 39138133 is a prime.

It is a super-3 number, since 3×39662421³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39662429) 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, 20181 + ... + 22058.

It is an arithmetic number, because the mean of its divisors is an integer number (6631680).

Almost surely, 2^39662421 is an apocalyptic number.

It is an amenable number.

39662421 is a deficient number, since it is larger than the sum of its proper divisors (13391019).

39662421 is a wasteful number, since it uses less digits than its factorization.

39662421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42555.

The product of its digits is 15552, while the sum is 33.

The square root of 39662421 is about 6297.8108101149. The cubic root of 39662421 is about 341.0303834550.

The spelling of 39662421 in words is "thirty-nine million, six hundred sixty-two thousand, four hundred twenty-one".