229638388326490 has 64 divisors (see below), whose sum is σ = 491069252782080. Its totient is φ = 76215333680640.

The previous prime is 229638388326421. The next prime is 229638388326497. The reversal of 229638388326490 is 94623883836922.

It is not an unprimeable number, because it can be changed into a prime (229638388326497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902042874 + ... + 902297413.

It is an arithmetic number, because the mean of its divisors is an integer number (7672957074720).

Almost surely, 2^{229638388326490} is an apocalyptic number.

229638388326490 is an abundant number, since it is smaller than the sum of its proper divisors (261430864455590).

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

229638388326490 is a wasteful number, since it uses less digits than its factorization.

229638388326490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804340407.

The product of its (nonzero) digits is 1289945088, while the sum is 73.

The spelling of 229638388326490 in words is "two hundred twenty-nine trillion, six hundred thirty-eight billion, three hundred eighty-eight million, three hundred twenty-six thousand, four hundred ninety".