1272238395390 has 256 divisors, whose sum is σ = 3637597040640. Its totient is φ = 315297515520.

The previous prime is 1272238395371. The next prime is 1272238395521. The reversal of 1272238395390 is 935938322721.

1272238395390 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 23 + 83 + 9 + 539 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 117457275 + ... + 117468105.

It is an arithmetic number, because the mean of its divisors is an integer number (14209363440).

Almost surely, 2^{1272238395390} is an apocalyptic number.

1272238395390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272238395390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818798520320).

1272238395390 is an abundant number, since it is smaller than the sum of its proper divisors (2365358645250).

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

1272238395390 is a wasteful number, since it uses less digits than its factorization.

1272238395390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11184 (or 11178 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 1272238395390 in words is "one trillion, two hundred seventy-two billion, two hundred thirty-eight million, three hundred ninety-five thousand, three hundred ninety".