32428139 has 4 divisors (see below), whose sum is σ = 33474240. Its totient is φ = 31382040.

The previous prime is 32428093. The next prime is 32428147. The reversal of 32428139 is 93182423.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 32428139 - 2⁸ = 32427883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32428159) 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, 523004 + ... + 523065.

It is an arithmetic number, because the mean of its divisors is an integer number (8368560).

Almost surely, 2^32428139 is an apocalyptic number.

32428139 is a deficient number, since it is larger than the sum of its proper divisors (1046101).

32428139 is a wasteful number, since it uses less digits than its factorization.

32428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046100.

The product of its digits is 10368, while the sum is 32.

The square root of 32428139 is about 5694.5710110596. The cubic root of 32428139 is about 318.8898346347.

The spelling of 32428139 in words is "thirty-two million, four hundred twenty-eight thousand, one hundred thirty-nine".