40008730 has 32 divisors (see below), whose sum is σ = 75613824. Its totient is φ = 15212736.

The previous prime is 40008697. The next prime is 40008733. The reversal of 40008730 is 3780004.

It is not an unprimeable number, because it can be changed into a prime (40008733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44869 + ... + 45751.

It is an arithmetic number, because the mean of its divisors is an integer number (2362932).

Almost surely, 2^40008730 is an apocalyptic number.

40008730 is a deficient number, since it is larger than the sum of its proper divisors (35605094).

40008730 is a wasteful number, since it uses less digits than its factorization.

40008730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40008730 is about 6325.2454497830. The cubic root of 40008730 is about 342.0200676756.

Adding to 40008730 its reverse (3780004), we get a palindrome (43788734).

The spelling of 40008730 in words is "forty million, eight thousand, seven hundred thirty".