399361455 has 16 divisors (see below), whose sum is σ = 709976160. Its totient is φ = 212992704.

The previous prime is 399361453. The next prime is 399361481. The reversal of 399361455 is 554163993.

It is not a de Polignac number, because 399361455 - 2¹ = 399361453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 399361455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399361453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478982 + ... + 1479251.

It is an arithmetic number, because the mean of its divisors is an integer number (44373510).

Almost surely, 2^399361455 is an apocalyptic number.

399361455 is a deficient number, since it is larger than the sum of its proper divisors (310614705).

399361455 is a wasteful number, since it uses less digits than its factorization.

399361455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958247 (or 2958241 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 399361455 is about 19984.0299989767. The cubic root of 399361455 is about 736.4140209320.

The spelling of 399361455 in words is "three hundred ninety-nine million, three hundred sixty-one thousand, four hundred fifty-five".