9621438290 has 32 divisors (see below), whose sum is σ = 17380224000. Its totient is φ = 3834906048.

The previous prime is 9621438289. The next prime is 9621438313. The reversal of 9621438290 is 928341269.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5119571 + ... + 5121449.

It is an arithmetic number, because the mean of its divisors is an integer number (543132000).

Almost surely, 2^9621438290 is an apocalyptic number.

9621438290 is a deficient number, since it is larger than the sum of its proper divisors (7758785710).

9621438290 is a wasteful number, since it uses less digits than its factorization.

9621438290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 9621438290 is about 98088.9305171588. The cubic root of 9621438290 is about 2126.8980165121.

The spelling of 9621438290 in words is "nine billion, six hundred twenty-one million, four hundred thirty-eight thousand, two hundred ninety".