28719207 has 24 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 17272080.

The previous prime is 28719199. The next prime is 28719221. The reversal of 28719207 is 70291782.

It is not a de Polignac number, because 28719207 - 2³ = 28719199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28719277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12718 + ... + 14804.

It is an arithmetic number, because the mean of its divisors is an integer number (1900080).

Almost surely, 2^28719207 is an apocalyptic number.

28719207 is a deficient number, since it is larger than the sum of its proper divisors (16882713).

28719207 is a wasteful number, since it uses less digits than its factorization.

28719207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28719207 is about 5359.0304160361. The cubic root of 28719207 is about 306.2368728512.

The spelling of 28719207 in words is "twenty-eight million, seven hundred nineteen thousand, two hundred seven".