40415418 has 12 divisors (see below), whose sum is σ = 87566778. Its totient is φ = 13471800.

The previous prime is 40415407. The next prime is 40415461. The reversal of 40415418 is 81451404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40411449 + 3969 = 6357^2 + 63^2 .

It is a super-2 number, since 2×40415418² = 3266812024229448, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40415391 and 40415400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122633 + ... + 1122668.

Almost surely, 2^40415418 is an apocalyptic number.

40415418 is an abundant number, since it is smaller than the sum of its proper divisors (47151360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40415418 is a wasteful number, since it uses less digits than its factorization.

40415418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245309 (or 2245306 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 40415418 is about 6357.3121678898. The cubic root of 40415418 is about 343.1750389364.

The spelling of 40415418 in words is "forty million, four hundred fifteen thousand, four hundred eighteen".