39628931 has 8 divisors (see below), whose sum is σ = 41852160. Its totient is φ = 37447432.

The previous prime is 39628913. The next prime is 39628949. The reversal of 39628931 is 13982693.

It is an interprime number because it is at equal distance from previous prime (39628913) and next prime (39628949).

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

It is a cyclic number.

It is not a de Polignac number, because 39628931 - 2⁶ = 39628867 is a prime.

It is a super-2 number, since 2×39628931² = 3140904344405522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39628951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8471 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (5231520).

Almost surely, 2^39628931 is an apocalyptic number.

39628931 is a deficient number, since it is larger than the sum of its proper divisors (2223229).

39628931 is a wasteful number, since it uses less digits than its factorization.

39628931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20865.

The product of its digits is 69984, while the sum is 41.

The square root of 39628931 is about 6295.1513881717. The cubic root of 39628931 is about 340.9343704589.

The spelling of 39628931 in words is "thirty-nine million, six hundred twenty-eight thousand, nine hundred thirty-one".