231404378 has 8 divisors (see below), whose sum is σ = 347575968. Its totient is φ = 115545724.

The previous prime is 231404377. The next prime is 231404419. The reversal of 231404378 is 873404132.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231404377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76376 + ... + 79347.

It is an arithmetic number, because the mean of its divisors is an integer number (43446996).

Almost surely, 2^231404378 is an apocalyptic number.

231404378 is a deficient number, since it is larger than the sum of its proper divisors (116171590).

231404378 is a wasteful number, since it uses less digits than its factorization.

231404378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156468.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 231404378 is about 15211.9813962547. The cubic root of 231404378 is about 613.9370698058.

The spelling of 231404378 in words is "two hundred thirty-one million, four hundred four thousand, three hundred seventy-eight".