1391544812 has 12 divisors (see below), whose sum is σ = 2783089680. Its totient is φ = 596376336.

The previous prime is 1391544811. The next prime is 1391544821. The reversal of 1391544812 is 2184451931.

1391544812 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1391544811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24848987 + ... + 24849042.

It is an arithmetic number, because the mean of its divisors is an integer number (231924140).

Almost surely, 2^1391544812 is an apocalyptic number.

It is an amenable number.

1391544812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1391544812 is a wasteful number, since it uses less digits than its factorization.

1391544812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49698040 (or 49698038 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 1391544812 is about 37303.4155540749. The cubic root of 1391544812 is about 1116.4323156040.

The spelling of 1391544812 in words is "one billion, three hundred ninety-one million, five hundred forty-four thousand, eight hundred twelve".