531478378 has 8 divisors (see below), whose sum is σ = 844112772. Its totient is φ = 250107456.

The previous prime is 531478357. The next prime is 531478379. The reversal of 531478378 is 873874135.

It can be written as a sum of positive squares in 2 ways, for example, as 407757249 + 123721129 = 20193^2 + 11123^2 .

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

It is not an unprimeable number, because it can be changed into a prime (531478379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7815825 + ... + 7815892.

Almost surely, 2^531478378 is an apocalyptic number.

531478378 is a deficient number, since it is larger than the sum of its proper divisors (312634394).

531478378 is a wasteful number, since it uses less digits than its factorization.

531478378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15631736.

The product of its digits is 564480, while the sum is 46.

The square root of 531478378 is about 23053.8148253169. The cubic root of 531478378 is about 810.0189895462.

The spelling of 531478378 in words is "five hundred thirty-one million, four hundred seventy-eight thousand, three hundred seventy-eight".