1391540916 has 48 divisors (see below), whose sum is σ = 3444021504. Its totient is φ = 435787776.

The previous prime is 1391540911. The next prime is 1391540929. The reversal of 1391540916 is 6190451931.

1391540916 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1391540916² = 3872772241804238112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391540911) 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, 115221 + ... + 126723.

It is an arithmetic number, because the mean of its divisors is an integer number (71750448).

Almost surely, 2^1391540916 is an apocalyptic number.

It is an amenable number.

1391540916 is an abundant number, since it is smaller than the sum of its proper divisors (2052480588).

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

1391540916 is a wasteful number, since it uses less digits than its factorization.

1391540916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12120 (or 12118 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1391540916 is about 37303.3633336191. The cubic root of 1391540916 is about 1116.4312736866.

The spelling of 1391540916 in words is "one billion, three hundred ninety-one million, five hundred forty thousand, nine hundred sixteen".