1478394413 has 4 divisors (see below), whose sum is σ = 1481049180. Its totient is φ = 1475739648.

The previous prime is 1478394367. The next prime is 1478394457. The reversal of 1478394413 is 3144938741.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176411524 + 1301982889 = 13282^2 + 36083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1478394413 - 2²² = 1474200109 is a prime.

It is a super-2 number, since 2×1478394413² = 4371300080779229138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478394493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326548 + ... + 1327661.

It is an arithmetic number, because the mean of its divisors is an integer number (370262295).

Almost surely, 2^1478394413 is an apocalyptic number.

It is an amenable number.

1478394413 is a deficient number, since it is larger than the sum of its proper divisors (2654767).

1478394413 is an equidigital number, since it uses as much as digits as its factorization.

1478394413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654766.

The product of its digits is 290304, while the sum is 44.

The square root of 1478394413 is about 38449.8948373074. The cubic root of 1478394413 is about 1139.1915918943.

The spelling of 1478394413 in words is "one billion, four hundred seventy-eight million, three hundred ninety-four thousand, four hundred thirteen".