9893078640 has 160 divisors (see below), whose sum is σ = 34187365440. Its totient is φ = 2629545984.

The previous prime is 9893078623. The next prime is 9893078659. The reversal of 9893078640 is 468703989.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 668764 + ... + 683396.

It is an arithmetic number, because the mean of its divisors is an integer number (213671034).

Almost surely, 2^9893078640 is an apocalyptic number.

9893078640 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 9893078640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17093682720).

9893078640 is an abundant number, since it is smaller than the sum of its proper divisors (24294286800).

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

9893078640 is a wasteful number, since it uses less digits than its factorization.

9893078640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14968 (or 14956 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 9893078640 is about 99463.9564867596. The cubic root of 9893078640 is about 2146.7286568693.

The spelling of 9893078640 in words is "nine billion, eight hundred ninety-three million, seventy-eight thousand, six hundred forty".