400913887 has 8 divisors (see below), whose sum is σ = 437899392. Its totient is φ = 364018200.

The previous prime is 400913879. The next prime is 400913911. The reversal of 400913887 is 788319004.

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

It is a cyclic number.

It is not a de Polignac number, because 400913887 - 2³ = 400913879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400913587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12939 + ... + 31132.

It is an arithmetic number, because the mean of its divisors is an integer number (54737424).

Almost surely, 2^400913887 is an apocalyptic number.

400913887 is a deficient number, since it is larger than the sum of its proper divisors (36985505).

400913887 is a wasteful number, since it uses less digits than its factorization.

400913887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44909.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 400913887 is about 20022.8341400512. The cubic root of 400913887 is about 737.3670043431.

The spelling of 400913887 in words is "four hundred million, nine hundred thirteen thousand, eight hundred eighty-seven".