28973406 has 144 divisors (see below), whose sum is σ = 80635392. Its totient is φ = 6854400.

The previous prime is 28973393. The next prime is 28973411. The reversal of 28973406 is 60437982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 934611 + ... + 934641.

It is an arithmetic number, because the mean of its divisors is an integer number (559968).

Almost surely, 2^28973406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28973406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40317696).

28973406 is an abundant number, since it is smaller than the sum of its proper divisors (51661986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28973406 is a wasteful number, since it uses less digits than its factorization.

28973406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 71 counting only the distinct ones).

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

The square root of 28973406 is about 5382.6950498798. The cubic root of 28973406 is about 307.1377398308.

The spelling of 28973406 in words is "twenty-eight million, nine hundred seventy-three thousand, four hundred six".