28431061 has 8 divisors (see below), whose sum is σ = 29576448. Its totient is φ = 27300000.

The previous prime is 28431031. The next prime is 28431071. The reversal of 28431061 is 16013482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28431061 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 (28431031) 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, 561 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (3697056).

Almost surely, 2^28431061 is an apocalyptic number.

It is an amenable number.

28431061 is a deficient number, since it is larger than the sum of its proper divisors (1145387).

28431061 is a wasteful number, since it uses less digits than its factorization.

28431061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28431061 is about 5332.0784877944. The cubic root of 28431061 is about 305.2092481511.

The spelling of 28431061 in words is "twenty-eight million, four hundred thirty-one thousand, sixty-one".