9940426072 has 8 divisors (see below), whose sum is σ = 18638298900. Its totient is φ = 4970213032.

The previous prime is 9940426009. The next prime is 9940426091. The reversal of 9940426072 is 2706240499.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621276622 + ... + 621276637.

Almost surely, 2^9940426072 is an apocalyptic number.

It is an amenable number.

9940426072 is a deficient number, since it is larger than the sum of its proper divisors (8697872828).

9940426072 is a wasteful number, since it uses less digits than its factorization.

9940426072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242553265 (or 1242553261 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 9940426072 is about 99701.6854020031. The cubic root of 9940426072 is about 2150.1478947840.

The spelling of 9940426072 in words is "nine billion, nine hundred forty million, four hundred twenty-six thousand, seventy-two".