399822741 has 12 divisors (see below), whose sum is σ = 583241100. Its totient is φ = 263908800.

The previous prime is 399822707. The next prime is 399822743. The reversal of 399822741 is 147228993.

It can be written as a sum of positive squares in 2 ways, for example, as 244296900 + 155525841 = 15630^2 + 12471^2 .

It is not a de Polignac number, because 399822741 - 2⁷ = 399822613 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399822743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219016 + ... + 220833.

It is an arithmetic number, because the mean of its divisors is an integer number (48603425).

Almost surely, 2^399822741 is an apocalyptic number.

It is an amenable number.

399822741 is a deficient number, since it is larger than the sum of its proper divisors (183418359).

399822741 is a wasteful number, since it uses less digits than its factorization.

399822741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439956 (or 439953 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 399822741 is about 19995.5680339419. The cubic root of 399822741 is about 736.6974456905.

The spelling of 399822741 in words is "three hundred ninety-nine million, eight hundred twenty-two thousand, seven hundred forty-one".