378450389 has 4 divisors (see below), whose sum is σ = 378717024. Its totient is φ = 378183756.

The previous prime is 378450361. The next prime is 378450403. The reversal of 378450389 is 983054873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 378450389 - 2²⁴ = 361673173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378450329) 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, 131177 + ... + 134030.

It is an arithmetic number, because the mean of its divisors is an integer number (94679256).

Almost surely, 2^378450389 is an apocalyptic number.

It is an amenable number.

378450389 is a deficient number, since it is larger than the sum of its proper divisors (266635).

378450389 is a wasteful number, since it uses less digits than its factorization.

378450389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266634.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 378450389 is about 19453.8014022967. The cubic root of 378450389 is about 723.3297349992.

The spelling of 378450389 in words is "three hundred seventy-eight million, four hundred fifty thousand, three hundred eighty-nine".