9779990 has 32 divisors (see below), whose sum is σ = 19505664. Its totient is φ = 3500640.

The previous prime is 9779983. The next prime is 9779993. The reversal of 9779990 is 999779.

9779990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9779993) 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, 6707 + ... + 8033.

It is an arithmetic number, because the mean of its divisors is an integer number (609552).

Almost surely, 2^9779990 is an apocalyptic number.

9779990 is a deficient number, since it is larger than the sum of its proper divisors (9725674).

9779990 is a wasteful number, since it uses less digits than its factorization.

9779990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412.

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 9779990 is about 3127.2975553983. The cubic root of 9779990 is about 213.8517475535.

The spelling of 9779990 in words is "nine million, seven hundred seventy-nine thousand, nine hundred ninety".