39128231 has 8 divisors (see below), whose sum is σ = 40464384. Its totient is φ = 37796760.

The previous prime is 39128207. The next prime is 39128233. The reversal of 39128231 is 13282193.

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 39128231 - 2¹⁴ = 39111847 is a prime.

It is a super-2 number, since 2×39128231² = 3062036922378722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39128194 and 39128203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39128233) 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, 26786 + ... + 28208.

It is an arithmetic number, because the mean of its divisors is an integer number (5058048).

Almost surely, 2^39128231 is an apocalyptic number.

39128231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

39128231 is a deficient number, since it is larger than the sum of its proper divisors (1336153).

39128231 is a wasteful number, since it uses less digits than its factorization.

39128231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341.

The product of its digits is 2592, while the sum is 29.

The square root of 39128231 is about 6255.2562697303. The cubic root of 39128231 is about 339.4924115682.

The spelling of 39128231 in words is "thirty-nine million, one hundred twenty-eight thousand, two hundred thirty-one".