400903911 has 20 divisors (see below), whose sum is σ = 634111632. Its totient is φ = 251546688.

The previous prime is 400903903. The next prime is 400903931. The reversal of 400903911 is 119309004.

It is not a de Polignac number, because 400903911 - 2³ = 400903903 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400903931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 144195 + ... + 146948.

Almost surely, 2^400903911 is an apocalyptic number.

400903911 is a deficient number, since it is larger than the sum of its proper divisors (233207721).

400903911 is a wasteful number, since it uses less digits than its factorization.

400903911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291172 (or 291163 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 400903911 is about 20022.5850229185. The cubic root of 400903911 is about 737.3608882880.

The spelling of 400903911 in words is "four hundred million, nine hundred three thousand, nine hundred eleven".