1378730040 has 64 divisors (see below), whose sum is σ = 4162592160. Its totient is φ = 365314560.

The previous prime is 1378730021. The next prime is 1378730057. The reversal of 1378730040 is 400378731.

It is a junction number, because it is equal to n+sod(n) for n = 1378729983 and 1378730010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17751 + ... + 55430.

Almost surely, 2^1378730040 is an apocalyptic number.

1378730040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378730040 is an abundant number, since it is smaller than the sum of its proper divisors (2783862120).

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

1378730040 is a wasteful number, since it uses less digits than its factorization.

1378730040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73352 (or 73348 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1378730040 is about 37131.2542206697. The cubic root of 1378730040 is about 1112.9946567667.

The spelling of 1378730040 in words is "one billion, three hundred seventy-eight million, seven hundred thirty thousand, forty".