1298731392 has 96 divisors (see below), whose sum is σ = 4271152080. Its totient is φ = 371063808.

The previous prime is 1298731387. The next prime is 1298731463. The reversal of 1298731392 is 2931378921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72463 + ... + 88590.

Almost surely, 2^1298731392 is an apocalyptic number.

1298731392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1298731392 is an abundant number, since it is smaller than the sum of its proper divisors (2972420688).

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

1298731392 is a wasteful number, since it uses less digits than its factorization.

1298731392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161080 (or 161065 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1298731392 is about 36037.9160329784. The cubic root of 1298731392 is about 1091.0377547639.

The spelling of 1298731392 in words is "one billion, two hundred ninety-eight million, seven hundred thirty-one thousand, three hundred ninety-two".