123664530 has 32 divisors (see below), whose sum is σ = 323777088. Its totient is φ = 29979200.

The previous prime is 123664523. The next prime is 123664561. The reversal of 123664530 is 35466321.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 187041 + ... + 187700.

It is an arithmetic number, because the mean of its divisors is an integer number (10118034).

Almost surely, 2^123664530 is an apocalyptic number.

123664530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123664530 is an abundant number, since it is smaller than the sum of its proper divisors (200112558).

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

123664530 is a wasteful number, since it uses less digits than its factorization.

123664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374762.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 123664530 is about 11120.4554762833. The cubic root of 123664530 is about 498.2129941624.

The spelling of 123664530 in words is "one hundred twenty-three million, six hundred sixty-four thousand, five hundred thirty".