9777138 has 32 divisors (see below), whose sum is σ = 22456320. Its totient is φ = 2779920.

The previous prime is 9777113. The next prime is 9777161. The reversal of 9777138 is 8317779.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9777138.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10953 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (701760).

Almost surely, 2^9777138 is an apocalyptic number.

9777138 is an abundant number, since it is smaller than the sum of its proper divisors (12679182).

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

9777138 is a wasteful number, since it uses less digits than its factorization.

9777138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its digits is 74088, while the sum is 42.

The square root of 9777138 is about 3126.8415373984. The cubic root of 9777138 is about 213.8309580135.

The spelling of 9777138 in words is "nine million, seven hundred seventy-seven thousand, one hundred thirty-eight".