1378959958 has 4 divisors (see below), whose sum is σ = 2068439940. Its totient is φ = 689479978.

The previous prime is 1378959943. The next prime is 1378960013. The reversal of 1378959958 is 8599598731.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1378959958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344739988 + ... + 344739991.

It is an arithmetic number, because the mean of its divisors is an integer number (517109985).

Almost surely, 2^1378959958 is an apocalyptic number.

1378959958 is a deficient number, since it is larger than the sum of its proper divisors (689479982).

1378959958 is an equidigital number, since it uses as much as digits as its factorization.

1378959958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689479981.

The product of its digits is 24494400, while the sum is 64.

The square root of 1378959958 is about 37134.3501087605. The cubic root of 1378959958 is about 1113.0565212543.

The spelling of 1378959958 in words is "one billion, three hundred seventy-eight million, nine hundred fifty-nine thousand, nine hundred fifty-eight".