1408520139 has 8 divisors (see below), whose sum is σ = 2022490512. Its totient is φ = 866781600.

The previous prime is 1408520129. The next prime is 1408520173. The reversal of 1408520139 is 9310258041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1408520139 - 2⁷ = 1408520011 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1408520129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18057912 + ... + 18057989.

It is an arithmetic number, because the mean of its divisors is an integer number (252811314).

Almost surely, 2^1408520139 is an apocalyptic number.

1408520139 is a deficient number, since it is larger than the sum of its proper divisors (613970373).

1408520139 is a wasteful number, since it uses less digits than its factorization.

1408520139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36115917.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1408520139 is about 37530.2563140728. The cubic root of 1408520139 is about 1120.9537313629.

The spelling of 1408520139 in words is "one billion, four hundred eight million, five hundred twenty thousand, one hundred thirty-nine".