400421417 has 16 divisors (see below), whose sum is σ = 464605632. Its totient is φ = 341061120.

The previous prime is 400421407. The next prime is 400421423. The reversal of 400421417 is 714124004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400421417 - 2⁶ = 400421353 is a prime.

It is a super-2 number, since 2×400421417² = 320674622384575778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400421392 and 400421401.

It is not an unprimeable number, because it can be changed into a prime (400421407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37733 + ... + 47165.

It is an arithmetic number, because the mean of its divisors is an integer number (29037852).

Almost surely, 2^400421417 is an apocalyptic number.

It is an amenable number.

400421417 is a deficient number, since it is larger than the sum of its proper divisors (64184215).

400421417 is a wasteful number, since it uses less digits than its factorization.

400421417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9688.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 400421417 is about 20010.5326515813. The cubic root of 400421417 is about 737.0649611627.

The spelling of 400421417 in words is "four hundred million, four hundred twenty-one thousand, four hundred seventeen".