9940678020 has 864 divisors, whose sum is σ = 41479401600. Its totient is φ = 1986985728.

The previous prime is 9940678019. The next prime is 9940678159. The reversal of 9940678020 is 208760499.

It is a happy number.

It is a super-2 number, since 2×9940678020² (a number of 21 digits) contains 22 as substring.

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 287 ways as a sum of consecutive naturals, for example, 523193571 + ... + 523193589.

Almost surely, 2^9940678020 is an apocalyptic number.

9940678020 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 9940678020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20739700800).

9940678020 is an abundant number, since it is smaller than the sum of its proper divisors (31538723580).

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

9940678020 is a wasteful number, since it uses less digits than its factorization.

9940678020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 9940678020 is about 99702.9489032295. The cubic root of 9940678020 is about 2150.1660603663.

The spelling of 9940678020 in words is "nine billion, nine hundred forty million, six hundred seventy-eight thousand, twenty".