1293428740 has 24 divisors (see below), whose sum is σ = 2726539200. Its totient is φ = 515402208.

The previous prime is 1293428737. The next prime is 1293428753. The reversal of 1293428740 is 478243921.

It is a junction number, because it is equal to n+sod(n) for n = 1293428693 and 1293428702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117690 + ... + 128209.

It is an arithmetic number, because the mean of its divisors is an integer number (113605800).

Almost surely, 2^1293428740 is an apocalyptic number.

1293428740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1293428740 is an abundant number, since it is smaller than the sum of its proper divisors (1433110460).

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

1293428740 is a wasteful number, since it uses less digits than its factorization.

1293428740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246171 (or 246169 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 1293428740 is about 35964.2703248655. The cubic root of 1293428740 is about 1089.5508460015.

The spelling of 1293428740 in words is "one billion, two hundred ninety-three million, four hundred twenty-eight thousand, seven hundred forty".