423958378 has 4 divisors (see below), whose sum is σ = 635937570. Its totient is φ = 211979188.

The previous prime is 423958373. The next prime is 423958397. The reversal of 423958378 is 873859324.

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

It can be written as a sum of positive squares in only one way, i.e., 381147529 + 42810849 = 19523^2 + 6543^2 .

It is a Smith number, since the sum of its digits (49) 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 (423958373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105989593 + ... + 105989596.

Almost surely, 2^423958378 is an apocalyptic number.

423958378 is a deficient number, since it is larger than the sum of its proper divisors (211979192).

423958378 is a wasteful number, since it uses less digits than its factorization.

423958378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211979191.

The product of its digits is 1451520, while the sum is 49.

The square root of 423958378 is about 20590.2495856655. The cubic root of 423958378 is about 751.2325676301.

The spelling of 423958378 in words is "four hundred twenty-three million, nine hundred fifty-eight thousand, three hundred seventy-eight".