123040296 has 40 divisors (see below), whose sum is σ = 344628570. Its totient is φ = 41013216.

The previous prime is 123040273. The next prime is 123040297. The reversal of 123040296 is 692040321.

It can be written as a sum of positive squares in only one way, i.e., 72488196 + 50552100 = 8514^2 + 7110^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123040297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 94291 + ... + 95586.

Almost surely, 2^123040296 is an apocalyptic number.

It is an amenable number.

123040296 is an abundant number, since it is smaller than the sum of its proper divisors (221588274).

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

123040296 is a wasteful number, since it uses less digits than its factorization.

123040296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189895 (or 189882 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 123040296 is about 11092.3530416229. The cubic root of 123040296 is about 497.3732862475.

The spelling of 123040296 in words is "one hundred twenty-three million, forty thousand, two hundred ninety-six".