28970073 has 12 divisors (see below), whose sum is σ = 45649968. Its totient is φ = 17557560.

The previous prime is 28970021. The next prime is 28970077. The reversal of 28970073 is 37007982.

It is not a de Polignac number, because 28970073 - 2⁸ = 28969817 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28970077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146215 + ... + 146412.

It is an arithmetic number, because the mean of its divisors is an integer number (3804164).

Almost surely, 2^28970073 is an apocalyptic number.

It is an amenable number.

28970073 is a deficient number, since it is larger than the sum of its proper divisors (16679895).

28970073 is a wasteful number, since it uses less digits than its factorization.

28970073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292644 (or 292641 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 28970073 is about 5382.3854377032. The cubic root of 28970073 is about 307.1259620262.

The spelling of 28970073 in words is "twenty-eight million, nine hundred seventy thousand, seventy-three".