40454217 has 36 divisors (see below), whose sum is σ = 63406980. Its totient is φ = 24822336.

The previous prime is 40454213. The next prime is 40454231. The reversal of 40454217 is 71245404.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 9217296 = 5589^2 + 3036^2 .

It is not a de Polignac number, because 40454217 - 2² = 40454213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40454213) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 137923 + ... + 138215.

It is an arithmetic number, because the mean of its divisors is an integer number (1761305).

Almost surely, 2^40454217 is an apocalyptic number.

It is an amenable number.

40454217 is a deficient number, since it is larger than the sum of its proper divisors (22952763).

40454217 is a wasteful number, since it uses less digits than its factorization.

40454217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 40454217 is about 6360.3629613411. The cubic root of 40454217 is about 343.2848203886.

The spelling of 40454217 in words is "forty million, four hundred fifty-four thousand, two hundred seventeen".