1578213380 has 48 divisors (see below), whose sum is σ = 3354099840. Its totient is φ = 623724288.

The previous prime is 1578213349. The next prime is 1578213389. The reversal of 1578213380 is 833128751.

It is a happy number.

It is a super-2 number, since 2×1578213380² = 4981514945622048800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1578213389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666067 + ... + 1667013.

It is an arithmetic number, because the mean of its divisors is an integer number (69877080).

Almost surely, 2^1578213380 is an apocalyptic number.

1578213380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1578213380 is an abundant number, since it is smaller than the sum of its proper divisors (1775886460).

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

1578213380 is a wasteful number, since it uses less digits than its factorization.

1578213380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1578213380 is about 39726.7338199354. The cubic root of 1578213380 is about 1164.2741104859.

The spelling of 1578213380 in words is "one billion, five hundred seventy-eight million, two hundred thirteen thousand, three hundred eighty".