9819073940 has 24 divisors (see below), whose sum is σ = 22206213960. Its totient is φ = 3625504128.

The previous prime is 9819073939. The next prime is 9819073967. The reversal of 9819073940 is 493709189.

It can be written as a sum of positive squares in 4 ways, for example, as 1606727056 + 8212346884 = 40084^2 + 90622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18882575 + ... + 18883094.

It is an arithmetic number, because the mean of its divisors is an integer number (925258915).

Almost surely, 2^9819073940 is an apocalyptic number.

It is an amenable number.

9819073940 is an abundant number, since it is smaller than the sum of its proper divisors (12387140020).

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

9819073940 is a wasteful number, since it uses less digits than its factorization.

9819073940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37765691 (or 37765689 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 9819073940 is about 99091.2404806802. The cubic root of 9819073940 is about 2141.3624203523.

The spelling of 9819073940 in words is "nine billion, eight hundred nineteen million, seventy-three thousand, nine hundred forty".