9777690 has 96 divisors (see below), whose sum is σ = 28029456. Its totient is φ = 2350080.

The previous prime is 9777671. The next prime is 9777707. The reversal of 9777690 is 967779.

It can be written as a sum of positive squares in 8 ways, for example, as 651249 + 9126441 = 807^2 + 3021^2 .

It is a super-2 number, since 2×9777690² = 191206443472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71302 + ... + 71438.

Almost surely, 2^9777690 is an apocalyptic number.

9777690 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9777690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14014728).

9777690 is an abundant number, since it is smaller than the sum of its proper divisors (18251766).

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

9777690 is a wasteful number, since it uses less digits than its factorization.

9777690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 9777690 is about 3126.9298041370. The cubic root of 9777690 is about 213.8349821109.

The spelling of 9777690 in words is "nine million, seven hundred seventy-seven thousand, six hundred ninety".