399240611845 has 16 divisors (see below), whose sum is σ = 484024004352. Its totient is φ = 316104817600.

The previous prime is 399240611837. The next prime is 399240611867. The reversal of 399240611845 is 548116042993.

It is not a de Polignac number, because 399240611845 - 2³ = 399240611837 is a prime.

It is a super-2 number, since 2×399240611845² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399240611792 and 399240611801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128774 + ... + 1439656.

It is an arithmetic number, because the mean of its divisors is an integer number (30251500272).

Almost surely, 2^399240611845 is an apocalyptic number.

It is an amenable number.

399240611845 is a deficient number, since it is larger than the sum of its proper divisors (84783392507).

399240611845 is a wasteful number, since it uses less digits than its factorization.

399240611845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313532.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 399240611845 in words is "three hundred ninety-nine billion, two hundred forty million, six hundred eleven thousand, eight hundred forty-five".