1352123640 has 144 divisors (see below), whose sum is σ = 5111921880. Its totient is φ = 309052800.

The previous prime is 1352123639. The next prime is 1352123653. The reversal of 1352123640 is 463212531.

1352123640 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 12 + 3 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20686 + ... + 55965.

Almost surely, 2^1352123640 is an apocalyptic number.

1352123640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1352123640 is an abundant number, since it is smaller than the sum of its proper divisors (3759798240).

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

1352123640 is a wasteful number, since it uses less digits than its factorization.

1352123640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76682 (or 76668 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1352123640 is about 36771.2338656184. The cubic root of 1352123640 is about 1105.7886686964.

The spelling of 1352123640 in words is "one billion, three hundred fifty-two million, one hundred twenty-three thousand, six hundred forty".