123528406 has 16 divisors (see below), whose sum is σ = 187046640. Its totient is φ = 61182720.

The previous prime is 123528403. The next prime is 123528407. The reversal of 123528406 is 604825321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123528403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108850 + ... + 109978.

It is an arithmetic number, because the mean of its divisors is an integer number (11690415).

Almost surely, 2^123528406 is an apocalyptic number.

123528406 is a deficient number, since it is larger than the sum of its proper divisors (63518234).

123528406 is a wasteful number, since it uses less digits than its factorization.

123528406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 123528406 is about 11114.3333583261. Note that the first 4 decimals coincide. The cubic root of 123528406 is about 498.0301240359.

It can be divided in two parts, 123 and 528406, that added together give a square (528529 = 727²).

The spelling of 123528406 in words is "one hundred twenty-three million, five hundred twenty-eight thousand, four hundred six".