28631667 has 8 divisors (see below), whose sum is σ = 38307024. Its totient is φ = 19022048.

The previous prime is 28631663. The next prime is 28631717. The reversal of 28631667 is 76613682.

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 28631667 - 2² = 28631663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28631663) 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, 15408 + ... + 17165.

It is an arithmetic number, because the mean of its divisors is an integer number (4788378).

Almost surely, 2^28631667 is an apocalyptic number.

28631667 is a deficient number, since it is larger than the sum of its proper divisors (9675357).

28631667 is a wasteful number, since it uses less digits than its factorization.

28631667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32869.

The product of its digits is 72576, while the sum is 39.

The square root of 28631667 is about 5350.8566603863. The cubic root of 28631667 is about 305.9254057997.

The spelling of 28631667 in words is "twenty-eight million, six hundred thirty-one thousand, six hundred sixty-seven".