123785289790 has 64 divisors (see below), whose sum is σ = 230057957376. Its totient is φ = 47928667392.

The previous prime is 123785289779. The next prime is 123785289799. The reversal of 123785289790 is 97982587321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123785289799) 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, 62109034 + ... + 62111026.

It is an arithmetic number, because the mean of its divisors is an integer number (3594655584).

Almost surely, 2^123785289790 is an apocalyptic number.

123785289790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123785289790 is a deficient number, since it is larger than the sum of its proper divisors (106272667586).

123785289790 is a wasteful number, since it uses less digits than its factorization.

123785289790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 123785289790 in words is "one hundred twenty-three billion, seven hundred eighty-five million, two hundred eighty-nine thousand, seven hundred ninety".