28631673 has 48 divisors (see below), whose sum is σ = 49510656. Its totient is φ = 15603840.

The previous prime is 28631663. The next prime is 28631717. The reversal of 28631673 is 37613682.

It is a happy number.

It is not a de Polignac number, because 28631673 - 2⁶ = 28631609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28631623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165415 + ... + 165587.

It is an arithmetic number, because the mean of its divisors is an integer number (1031472).

Almost surely, 2^28631673 is an apocalyptic number.

It is an amenable number.

28631673 is a deficient number, since it is larger than the sum of its proper divisors (20878983).

28631673 is a wasteful number, since it uses less digits than its factorization.

28631673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 291 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28631673 is about 5350.8572210441. The cubic root of 28631673 is about 305.9254271695.

Subtracting 28631673 from its reverse (37613682), we obtain a square (8982009 = 2997²).

The spelling of 28631673 in words is "twenty-eight million, six hundred thirty-one thousand, six hundred seventy-three".