9773431920 has 640 divisors, whose sum is σ = 41654476800. Its totient is φ = 2055241728.

The previous prime is 9773431919. The next prime is 9773431931. The reversal of 9773431920 is 291343779.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12080476 + ... + 12081284.

It is an arithmetic number, because the mean of its divisors is an integer number (65085120).

Almost surely, 2^9773431920 is an apocalyptic number.

9773431920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9773431920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20827238400).

9773431920 is an abundant number, since it is smaller than the sum of its proper divisors (31881044880).

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

9773431920 is a wasteful number, since it uses less digits than its factorization.

9773431920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 9773431920 is about 98860.6692269479. The cubic root of 9773431920 is about 2138.0393665036.

The spelling of 9773431920 in words is "nine billion, seven hundred seventy-three million, four hundred thirty-one thousand, nine hundred twenty".