1378520418 has 32 divisors (see below), whose sum is σ = 3009545280. Its totient is φ = 417474560.

The previous prime is 1378520413. The next prime is 1378520443. The reversal of 1378520418 is 8140258731.

It is a super-4 number, since 4×1378520418⁴ (a number of 38 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1378520411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119146 + ... + 130202.

It is an arithmetic number, because the mean of its divisors is an integer number (94048290).

Almost surely, 2^1378520418 is an apocalyptic number.

1378520418 is an abundant number, since it is smaller than the sum of its proper divisors (1631024862).

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

1378520418 is a wasteful number, since it uses less digits than its factorization.

1378520418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12962.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1378520418 is about 37128.4313969766. The cubic root of 1378520418 is about 1112.9382473696.

The spelling of 1378520418 in words is "one billion, three hundred seventy-eight million, five hundred twenty thousand, four hundred eighteen".