1391954118 has 32 divisors (see below), whose sum is σ = 3016227456. Its totient is φ = 426534528.

The previous prime is 1391954111. The next prime is 1391954143. The reversal of 1391954118 is 8114591931.

It is a happy number.

1391954118 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1391954118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391954111) 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, 154296 + ... + 163067.

It is an arithmetic number, because the mean of its divisors is an integer number (94257108).

Almost surely, 2^1391954118 is an apocalyptic number.

1391954118 is an abundant number, since it is smaller than the sum of its proper divisors (1624273338).

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

1391954118 is a wasteful number, since it uses less digits than its factorization.

1391954118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317428.

The product of its digits is 38880, while the sum is 42.

The square root of 1391954118 is about 37308.9013239468. The cubic root of 1391954118 is about 1116.5417665407.

The spelling of 1391954118 in words is "one billion, three hundred ninety-one million, nine hundred fifty-four thousand, one hundred eighteen".