123491268 has 36 divisors (see below), whose sum is σ = 315085680. Its totient is φ = 40777776.

The previous prime is 123491257. The next prime is 123491293. The reversal of 123491268 is 862194321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12178 + ... + 19881.

It is an arithmetic number, because the mean of its divisors is an integer number (8752380).

Almost surely, 2^123491268 is an apocalyptic number.

123491268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

123491268 is an abundant number, since it is smaller than the sum of its proper divisors (191594412).

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

123491268 is a wasteful number, since it uses less digits than its factorization.

123491268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32176 (or 32171 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 123491268 is about 11112.6625072482. The cubic root of 123491268 is about 497.9802092101.

The spelling of 123491268 in words is "one hundred twenty-three million, four hundred ninety-one thousand, two hundred sixty-eight".