399974295658 has 16 divisors (see below), whose sum is σ = 701616041280. Its totient is φ = 167431100256.

The previous prime is 399974295653. The next prime is 399974295671. The reversal of 399974295658 is 856592479993.

It is a super-2 number, since 2×399974295658² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399974295653) 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 7 ways as a sum of consecutive naturals, for example, 332203963 + ... + 332205166.

It is an arithmetic number, because the mean of its divisors is an integer number (43851002580).

Almost surely, 2^399974295658 is an apocalyptic number.

399974295658 is a deficient number, since it is larger than the sum of its proper divisors (301641745622).

399974295658 is a wasteful number, since it uses less digits than its factorization.

399974295658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664409181.

The product of its digits is 1322697600, while the sum is 76.

The spelling of 399974295658 in words is "three hundred ninety-nine billion, nine hundred seventy-four million, two hundred ninety-five thousand, six hundred fifty-eight".