399378453 has 12 divisors (see below), whose sum is σ = 545184000. Its totient is φ = 260056776.

The previous prime is 399378443. The next prime is 399378457. The reversal of 399378453 is 354873993.

It is not a de Polignac number, because 399378453 - 2⁶ = 399378389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399378396 and 399378405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399378457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30453 + ... + 41546.

It is an arithmetic number, because the mean of its divisors is an integer number (45432000).

Almost surely, 2^399378453 is an apocalyptic number.

It is an amenable number.

399378453 is a deficient number, since it is larger than the sum of its proper divisors (145805547).

399378453 is an equidigital number, since it uses as much as digits as its factorization.

399378453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72088 (or 72045 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The square root of 399378453 is about 19984.4552840451. The cubic root of 399378453 is about 736.4244687672.

The spelling of 399378453 in words is "three hundred ninety-nine million, three hundred seventy-eight thousand, four hundred fifty-three".