28973949 has 16 divisors (see below), whose sum is σ = 40055808. Its totient is φ = 18616752.

The previous prime is 28973947. The next prime is 28973957. The reversal of 28973949 is 94937982.

It is not a de Polignac number, because 28973949 - 2¹ = 28973947 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28973941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7914 + ... + 10980.

It is an arithmetic number, because the mean of its divisors is an integer number (2503488).

Almost surely, 2^28973949 is an apocalyptic number.

It is an amenable number.

28973949 is a deficient number, since it is larger than the sum of its proper divisors (11081859).

28973949 is a wasteful number, since it uses less digits than its factorization.

28973949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184.

The product of its digits is 979776, while the sum is 51.

The square root of 28973949 is about 5382.7454890604. The cubic root of 28973949 is about 307.1396585415.

The spelling of 28973949 in words is "twenty-eight million, nine hundred seventy-three thousand, nine hundred forty-nine".