28870246 has 4 divisors (see below), whose sum is σ = 43305372. Its totient is φ = 14435122.

The previous prime is 28870241. The next prime is 28870279. The reversal of 28870246 is 64207882.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28870246² = 1666982208201032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28870241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7217560 + ... + 7217563.

It is an arithmetic number, because the mean of its divisors is an integer number (10826343).

Almost surely, 2^28870246 is an apocalyptic number.

28870246 is a deficient number, since it is larger than the sum of its proper divisors (14435126).

28870246 is a wasteful number, since it uses less digits than its factorization.

28870246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14435125.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28870246 is about 5373.1039446488. The cubic root of 28870246 is about 306.7727843737.

The spelling of 28870246 in words is "twenty-eight million, eight hundred seventy thousand, two hundred forty-six".