400416491 has 8 divisors (see below), whose sum is σ = 416112000. Its totient is φ = 384894720.

The previous prime is 400416449. The next prime is 400416493. The reversal of 400416491 is 194614004.

It is a happy number.

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 400416491 - 2²² = 396222187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400416493) 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, 38726 + ... + 47963.

It is an arithmetic number, because the mean of its divisors is an integer number (52014000).

Almost surely, 2^400416491 is an apocalyptic number.

400416491 is a deficient number, since it is larger than the sum of its proper divisors (15695509).

400416491 is a wasteful number, since it uses less digits than its factorization.

400416491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86869.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 400416491 is about 20010.4095660234. The cubic root of 400416491 is about 737.0619386830.

The spelling of 400416491 in words is "four hundred million, four hundred sixteen thousand, four hundred ninety-one".