1293172928 has 56 divisors (see below), whose sum is σ = 2599334400. Its totient is φ = 638281728.

The previous prime is 1293172921. The next prime is 1293172973. The reversal of 1293172928 is 8292713921.

It is not an unprimeable number, because it can be changed into a prime (1293172921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3161588 + ... + 3161996.

Almost surely, 2^1293172928 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 1293172928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299667200).

1293172928 is an abundant number, since it is smaller than the sum of its proper divisors (1306161472).

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

1293172928 is a wasteful number, since it uses less digits than its factorization.

1293172928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 927 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 1293172928 is about 35960.7136747868. The cubic root of 1293172928 is about 1089.4790114660.

The spelling of 1293172928 in words is "one billion, two hundred ninety-three million, one hundred seventy-two thousand, nine hundred twenty-eight".