396435644 has 12 divisors (see below), whose sum is σ = 756831768. Its totient is φ = 180198000.

The previous prime is 396435617. The next prime is 396435709. The reversal of 396435644 is 446534693.

It is a super-2 number, since 2×396435644² = 314322439667389472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 9009901 = 396435644 / (3 + 9 + 6 + 4 + 3 + 5 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 396435595 and 396435604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4504907 + ... + 4504994.

It is an arithmetic number, because the mean of its divisors is an integer number (63069314).

Almost surely, 2^396435644 is an apocalyptic number.

It is an amenable number.

396435644 is a deficient number, since it is larger than the sum of its proper divisors (360396124).

396435644 is a wasteful number, since it uses less digits than its factorization.

396435644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009916 (or 9009914 counting only the distinct ones).

The product of its digits is 933120, while the sum is 44.

The square root of 396435644 is about 19910.6917006919. The cubic root of 396435644 is about 734.6112334653.

The spelling of 396435644 in words is "three hundred ninety-six million, four hundred thirty-five thousand, six hundred forty-four".