1293978392 has 64 divisors (see below), whose sum is σ = 2963589120. Its totient is φ = 517022208.

The previous prime is 1293978379. The next prime is 1293978461. The reversal of 1293978392 is 2938793921.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 95513 + ... + 108215.

It is an arithmetic number, because the mean of its divisors is an integer number (46306080).

Almost surely, 2^1293978392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1293978392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481794560).

1293978392 is an abundant number, since it is smaller than the sum of its proper divisors (1669610728).

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

1293978392 is a wasteful number, since it uses less digits than its factorization.

1293978392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840 (or 12836 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 53.

The square root of 1293978392 is about 35971.9111530094. The cubic root of 1293978392 is about 1089.7051616771.

The spelling of 1293978392 in words is "one billion, two hundred ninety-three million, nine hundred seventy-eight thousand, three hundred ninety-two".