1378145858 has 16 divisors (see below), whose sum is σ = 2140051200. Its totient is φ = 664923600.

The previous prime is 1378145819. The next prime is 1378145863. The reversal of 1378145858 is 8585418731.

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, 10208 + ... + 53483.

It is an arithmetic number, because the mean of its divisors is an integer number (133753200).

Almost surely, 2^1378145858 is an apocalyptic number.

1378145858 is a deficient number, since it is larger than the sum of its proper divisors (761905342).

1378145858 is a wasteful number, since it uses less digits than its factorization.

1378145858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64073.

The product of its digits is 1075200, while the sum is 50.

The square root of 1378145858 is about 37123.3869413878. The cubic root of 1378145858 is about 1112.8374388250.

The spelling of 1378145858 in words is "one billion, three hundred seventy-eight million, one hundred forty-five thousand, eight hundred fifty-eight".