9923778240 has 112 divisors (see below), whose sum is σ = 31690653408. Its totient is φ = 2631000064.

The previous prime is 9923778217. The next prime is 9923778257. The reversal of 9923778240 is 428773299.

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, 136204 + ... + 195956.

Almost surely, 2^9923778240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9923778240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15845326704).

9923778240 is an abundant number, since it is smaller than the sum of its proper divisors (21766875168).

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

9923778240 is a wasteful number, since it uses less digits than its factorization.

9923778240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59946 (or 59936 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 9923778240 is about 99618.1621994704. The cubic root of 9923778240 is about 2148.9468965527.

The spelling of 9923778240 in words is "nine billion, nine hundred twenty-three million, seven hundred seventy-eight thousand, two hundred forty".