28913902 has 8 divisors (see below), whose sum is σ = 43557696. Its totient is φ = 14394672.

The previous prime is 28913893. The next prime is 28913903. The reversal of 28913902 is 20931982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28913903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30558 + ... + 31489.

It is an arithmetic number, because the mean of its divisors is an integer number (5444712).

Almost surely, 2^28913902 is an apocalyptic number.

28913902 is a deficient number, since it is larger than the sum of its proper divisors (14643794).

28913902 is a wasteful number, since it uses less digits than its factorization.

28913902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62282.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 28913902 is about 5377.1648663585. The cubic root of 28913902 is about 306.9273348163.

The spelling of 28913902 in words is "twenty-eight million, nine hundred thirteen thousand, nine hundred two".