1578216040 has 32 divisors (see below), whose sum is σ = 3553443360. Its totient is φ = 630849600.

The previous prime is 1578215953. The next prime is 1578216049. The reversal of 1578216040 is 406128751.

It is a junction number, because it is equal to n+sod(n) for n = 1578215987 and 1578216005.

It is not an unprimeable number, because it can be changed into a prime (1578216049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48355 + ... + 74125.

It is an arithmetic number, because the mean of its divisors is an integer number (111045105).

Almost surely, 2^1578216040 is an apocalyptic number.

1578216040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1578216040 is an abundant number, since it is smaller than the sum of its proper divisors (1975227320).

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

1578216040 is a wasteful number, since it uses less digits than its factorization.

1578216040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27313 (or 27309 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1578216040 is about 39726.7672986363. The cubic root of 1578216040 is about 1164.2747645942.

The spelling of 1578216040 in words is "one billion, five hundred seventy-eight million, two hundred sixteen thousand, forty".