9857902 has 4 divisors (see below), whose sum is σ = 14786856. Its totient is φ = 4928950.

The previous prime is 9857899. The next prime is 9857927. The reversal of 9857902 is 2097589.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2464474 + ... + 2464477.

It is an arithmetic number, because the mean of its divisors is an integer number (3696714).

Almost surely, 2^9857902 is an apocalyptic number.

9857902 is a deficient number, since it is larger than the sum of its proper divisors (4928954).

9857902 is a wasteful number, since it uses less digits than its factorization.

9857902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4928953.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 9857902 is about 3139.7296061922. The cubic root of 9857902 is about 214.4181273889.

The spelling of 9857902 in words is "nine million, eight hundred fifty-seven thousand, nine hundred two".