1378465770 has 64 divisors (see below), whose sum is σ = 3799042560. Its totient is φ = 316584000.

The previous prime is 1378465763. The next prime is 1378465771. The reversal of 1378465770 is 775648731.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1378465771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103656 + ... + 116195.

It is an arithmetic number, because the mean of its divisors is an integer number (59360040).

Almost surely, 2^1378465770 is an apocalyptic number.

1378465770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378465770 is an abundant number, since it is smaller than the sum of its proper divisors (2420576790).

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

1378465770 is a wasteful number, since it uses less digits than its factorization.

1378465770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219891.

The product of its (nonzero) digits is 987840, while the sum is 48.

The square root of 1378465770 is about 37127.6954577038. The cubic root of 1378465770 is about 1112.9235406226.

The spelling of 1378465770 in words is "one billion, three hundred seventy-eight million, four hundred sixty-five thousand, seven hundred seventy".