40507730 has 16 divisors (see below), whose sum is σ = 72987264. Its totient is φ = 16186800.

The previous prime is 40507703. The next prime is 40507757. The reversal of 40507730 is 3770504.

It is an interprime number because it is at equal distance from previous prime (40507703) and next prime (40507757).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40507730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16055 + ... + 18405.

It is an arithmetic number, because the mean of its divisors is an integer number (4561704).

Almost surely, 2^40507730 is an apocalyptic number.

40507730 is a deficient number, since it is larger than the sum of its proper divisors (32479534).

40507730 is a wasteful number, since it uses less digits than its factorization.

40507730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 40507730 is about 6364.5683278601. The cubic root of 40507730 is about 343.4361198726.

The spelling of 40507730 in words is "forty million, five hundred seven thousand, seven hundred thirty".