1378237345 has 32 divisors (see below), whose sum is σ = 1824560640. Its totient is φ = 995112960.

The previous prime is 1378237331. The next prime is 1378237363. The reversal of 1378237345 is 5437328731.

It is a de Polignac number, because none of the positive numbers 2^k-1378237345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202264 + ... + 208966.

It is an arithmetic number, because the mean of its divisors is an integer number (57017520).

Almost surely, 2^1378237345 is an apocalyptic number.

It is an amenable number.

1378237345 is a deficient number, since it is larger than the sum of its proper divisors (446323295).

1378237345 is a wasteful number, since it uses less digits than its factorization.

1378237345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6825.

The product of its digits is 423360, while the sum is 43.

The square root of 1378237345 is about 37124.6191226254. The cubic root of 1378237345 is about 1112.8620631915.

The spelling of 1378237345 in words is "one billion, three hundred seventy-eight million, two hundred thirty-seven thousand, three hundred forty-five".