9945437390 has 48 divisors (see below), whose sum is σ = 20833775424. Its totient is φ = 3408350400.

The previous prime is 9945437389. The next prime is 9945437407. The reversal of 9945437390 is 937345499.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2163995 + ... + 2168585.

It is an arithmetic number, because the mean of its divisors is an integer number (434036988).

Almost surely, 2^9945437390 is an apocalyptic number.

9945437390 is an abundant number, since it is smaller than the sum of its proper divisors (10888338034).

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

9945437390 is a wasteful number, since it uses less digits than its factorization.

9945437390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9033 (or 9026 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 53.

The square root of 9945437390 is about 99726.8137964911. The cubic root of 9945437390 is about 2150.5091557795.

The spelling of 9945437390 in words is "nine billion, nine hundred forty-five million, four hundred thirty-seven thousand, three hundred ninety".