123280038 has 24 divisors (see below), whose sum is σ = 305265168. Its totient is φ = 35222832.

The previous prime is 123280033. The next prime is 123280057. The reversal of 123280038 is 830082321.

It is a junction number, because it is equal to n+sod(n) for n = 123279993 and 123280020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123280033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489081 + ... + 489332.

It is an arithmetic number, because the mean of its divisors is an integer number (12719382).

Almost surely, 2^123280038 is an apocalyptic number.

123280038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123280038 is an abundant number, since it is smaller than the sum of its proper divisors (181985130).

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

123280038 is a wasteful number, since it uses less digits than its factorization.

123280038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978428 (or 978425 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 123280038 is about 11103.1544166512. The cubic root of 123280038 is about 497.6961178928.

The spelling of 123280038 in words is "one hundred twenty-three million, two hundred eighty thousand, thirty-eight".