40430665 has 32 divisors (see below), whose sum is σ = 57065472. Its totient is φ = 27192000.

The previous prime is 40430659. The next prime is 40430671. The reversal of 40430665 is 56603404.

It is an interprime number because it is at equal distance from previous prime (40430659) and next prime (40430671).

It is not a de Polignac number, because 40430665 - 2⁹ = 40430153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38700 + ... + 39730.

It is an arithmetic number, because the mean of its divisors is an integer number (1783296).

Almost surely, 2^40430665 is an apocalyptic number.

It is an amenable number.

40430665 is a deficient number, since it is larger than the sum of its proper divisors (16634807).

40430665 is a wasteful number, since it uses less digits than its factorization.

40430665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 40430665 is about 6358.5112251218. The cubic root of 40430665 is about 343.2181885744.

The spelling of 40430665 in words is "forty million, four hundred thirty thousand, six hundred sixty-five".