238426979890 has 32 divisors (see below), whose sum is σ = 488539714176. Its totient is φ = 82931122560.

The previous prime is 238426979851. The next prime is 238426979909. The reversal of 238426979890 is 98979624832.

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, 47117427 + ... + 47122486.

It is an arithmetic number, because the mean of its divisors is an integer number (15266866068).

Almost surely, 2^238426979890 is an apocalyptic number.

238426979890 is an abundant number, since it is smaller than the sum of its proper divisors (250112734286).

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

238426979890 is a wasteful number, since it uses less digits than its factorization.

238426979890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94239954.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 238426979890 in words is "two hundred thirty-eight billion, four hundred twenty-six million, nine hundred seventy-nine thousand, eight hundred ninety".