9851487438 has 32 divisors (see below), whose sum is σ = 21325248000. Its totient is φ = 3015989856.

The previous prime is 9851487407. The next prime is 9851487439. The reversal of 9851487438 is 8347841589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9851487439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301818 + ... + 332861.

It is an arithmetic number, because the mean of its divisors is an integer number (666414000).

Almost surely, 2^9851487438 is an apocalyptic number.

9851487438 is an abundant number, since it is smaller than the sum of its proper divisors (11473760562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9851487438 is a wasteful number, since it uses less digits than its factorization.

9851487438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634896.

The product of its digits is 7741440, while the sum is 57.

The square root of 9851487438 is about 99254.6595279033. The cubic root of 9851487438 is about 2143.7160982345.

The spelling of 9851487438 in words is "nine billion, eight hundred fifty-one million, four hundred eighty-seven thousand, four hundred thirty-eight".