399862357 has 4 divisors (see below), whose sum is σ = 400007916. Its totient is φ = 399716800.

The previous prime is 399862349. The next prime is 399862361. The reversal of 399862357 is 753268993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 753268993 = 2137 ⋅352489.

It can be written as a sum of positive squares in 2 ways, for example, as 147719716 + 252142641 = 12154^2 + 15879^2 .

It is a cyclic number.

It is not a de Polignac number, because 399862357 - 2³ = 399862349 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399862387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68578 + ... + 74179.

It is an arithmetic number, because the mean of its divisors is an integer number (100001979).

Almost surely, 2^399862357 is an apocalyptic number.

It is an amenable number.

399862357 is a deficient number, since it is larger than the sum of its proper divisors (145559).

399862357 is a wasteful number, since it uses less digits than its factorization.

399862357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145558.

The product of its digits is 2449440, while the sum is 52.

The square root of 399862357 is about 19996.5586289241. The cubic root of 399862357 is about 736.7217765077.

It can be divided in two parts, 399 and 862357, that multiplied together give a palindrome (344080443).

The spelling of 399862357 in words is "three hundred ninety-nine million, eight hundred sixty-two thousand, three hundred fifty-seven".