401903649 has 12 divisors (see below), whose sum is σ = 663460096. Its totient is φ = 229659192.

The previous prime is 401903641. The next prime is 401903669. The reversal of 401903649 is 946309104.

401903649 is a `hidden beast` number, since 4 + 0 + 1 + 9 + 0 + 3 + 649 = 666.

It is not a de Polignac number, because 401903649 - 2³ = 401903641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401903641) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3189649 + ... + 3189774.

Almost surely, 2^401903649 is an apocalyptic number.

It is an amenable number.

401903649 is a deficient number, since it is larger than the sum of its proper divisors (261556447).

401903649 is a wasteful number, since it uses less digits than its factorization.

401903649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379436 (or 6379433 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 401903649 is about 20047.5347362213. The cubic root of 401903649 is about 737.9733008606.

The spelling of 401903649 in words is "four hundred one million, nine hundred three thousand, six hundred forty-nine".