403780961 has 8 divisors (see below), whose sum is σ = 408192960. Its totient is φ = 399390768.

The previous prime is 403780943. The next prime is 403780967. The reversal of 403780961 is 169087304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403780961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (403780967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33260 + ... + 43746.

It is an arithmetic number, because the mean of its divisors is an integer number (51024120).

Almost surely, 2^403780961 is an apocalyptic number.

It is an amenable number.

403780961 is a deficient number, since it is larger than the sum of its proper divisors (4411999).

403780961 is a wasteful number, since it uses less digits than its factorization.

403780961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10903.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 403780961 is about 20094.3017047122. The cubic root of 403780961 is about 739.1205531243.

The spelling of 403780961 in words is "four hundred three million, seven hundred eighty thousand, nine hundred sixty-one".