9427939920 has 200 divisors, whose sum is σ = 37422616704. Its totient is φ = 2154947328.

The previous prime is 9427939909. The next prime is 9427939921. The reversal of 9427939920 is 299397249.

It is a super-2 number, since 2×9427939920² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9427939921) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 58564 + ... + 149283.

Almost surely, 2^9427939920 is an apocalyptic number.

9427939920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9427939920 is an abundant number, since it is smaller than the sum of its proper divisors (27994676784).

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

9427939920 is a wasteful number, since it uses less digits than its factorization.

9427939920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207879 (or 207864 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 9427939920 is about 97097.5793725055. The cubic root of 9427939920 is about 2112.5432164169.

The spelling of 9427939920 in words is "nine billion, four hundred twenty-seven million, nine hundred thirty-nine thousand, nine hundred twenty".