399226577 has 8 divisors (see below), whose sum is σ = 411259200. Its totient is φ = 387318960.

The previous prime is 399226567. The next prime is 399226591. The reversal of 399226577 is 775622993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399226577 - 2¹⁶ = 399161041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399226547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24749 + ... + 37562.

It is an arithmetic number, because the mean of its divisors is an integer number (51407400).

Almost surely, 2^399226577 is an apocalyptic number.

It is an amenable number.

399226577 is a deficient number, since it is larger than the sum of its proper divisors (12032623).

399226577 is a wasteful number, since it uses less digits than its factorization.

399226577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62503.

The product of its digits is 1428840, while the sum is 50.

The square root of 399226577 is about 19980.6550693414. The cubic root of 399226577 is about 736.3311075436.

The spelling of 399226577 in words is "three hundred ninety-nine million, two hundred twenty-six thousand, five hundred seventy-seven".