43906401 has 64 divisors (see below), whose sum is σ = 82944000. Its totient is φ = 22755600.

The previous prime is 43906351. The next prime is 43906403. The reversal of 43906401 is 10460934.

It is not a de Polignac number, because 43906401 - 2¹⁵ = 43873633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (43906403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101656 + ... + 102086.

It is an arithmetic number, because the mean of its divisors is an integer number (1296000).

Almost surely, 2^43906401 is an apocalyptic number.

It is an amenable number.

43906401 is a deficient number, since it is larger than the sum of its proper divisors (39037599).

43906401 is a wasteful number, since it uses less digits than its factorization.

43906401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 43906401 is about 6626.1905345379. The cubic root of 43906401 is about 352.7843247004.

The spelling of 43906401 in words is "forty-three million, nine hundred six thousand, four hundred one".