32678391 has 4 divisors (see below), whose sum is σ = 43571192. Its totient is φ = 21785592.

The previous prime is 32678341. The next prime is 32678407. The reversal of 32678391 is 19387623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19387623 = 3 ⋅6462541.

It is not a de Polignac number, because 32678391 - 2¹⁰ = 32677367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32678341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5446396 + ... + 5446401.

It is an arithmetic number, because the mean of its divisors is an integer number (10892798).

Almost surely, 2^32678391 is an apocalyptic number.

32678391 is a deficient number, since it is larger than the sum of its proper divisors (10892801).

32678391 is a wasteful number, since it uses less digits than its factorization.

32678391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10892800.

The product of its digits is 54432, while the sum is 39.

The square root of 32678391 is about 5716.5016399893. The cubic root of 32678391 is about 319.7080377363.

The spelling of 32678391 in words is "thirty-two million, six hundred seventy-eight thousand, three hundred ninety-one".