1357780812 has 96 divisors (see below), whose sum is σ = 3472761600. Its totient is φ = 411247872.

The previous prime is 1357780807. The next prime is 1357780829. The reversal of 1357780812 is 2180877531.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1143283 + ... + 1144469.

It is an arithmetic number, because the mean of its divisors is an integer number (36174600).

Almost surely, 2^1357780812 is an apocalyptic number.

1357780812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1357780812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736380800).

1357780812 is an abundant number, since it is smaller than the sum of its proper divisors (2114980788).

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

1357780812 is a wasteful number, since it uses less digits than its factorization.

1357780812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1357780812 is about 36848.0774532404. The cubic root of 1357780812 is about 1107.3286986115.

The spelling of 1357780812 in words is "one billion, three hundred fifty-seven million, seven hundred eighty thousand, eight hundred twelve".