1578045378 has 64 divisors (see below), whose sum is σ = 3891928320. Its totient is φ = 415383552.

The previous prime is 1578045377. The next prime is 1578045431. The reversal of 1578045378 is 8735408751.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1578045377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312538 + ... + 317546.

It is an arithmetic number, because the mean of its divisors is an integer number (60811380).

Almost surely, 2^1578045378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1578045378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945964160).

1578045378 is an abundant number, since it is smaller than the sum of its proper divisors (2313882942).

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

1578045378 is a wasteful number, since it uses less digits than its factorization.

1578045378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611.

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 1578045378 is about 39724.6192933299. The cubic root of 1578045378 is about 1164.2327964019.

The spelling of 1578045378 in words is "one billion, five hundred seventy-eight million, forty-five thousand, three hundred seventy-eight".