1315409478 has 32 divisors (see below), whose sum is σ = 2701974240. Its totient is φ = 426666240.

The previous prime is 1315409477. The next prime is 1315409489. The reversal of 1315409478 is 8749045131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315409477) 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, 90928 + ... + 104396.

It is an arithmetic number, because the mean of its divisors is an integer number (84436695).

Almost surely, 2^1315409478 is an apocalyptic number.

1315409478 is an abundant number, since it is smaller than the sum of its proper divisors (1386564762).

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

1315409478 is a wasteful number, since it uses less digits than its factorization.

1315409478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13912.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1315409478 is about 36268.5742482387. The cubic root of 1315409478 is about 1095.6882110562.

The spelling of 1315409478 in words is "one billion, three hundred fifteen million, four hundred nine thousand, four hundred seventy-eight".