40730145 has 16 divisors (see below), whose sum is σ = 65329152. Its totient is φ = 21669120.

The previous prime is 40730117. The next prime is 40730149. The reversal of 40730145 is 54103704.

It is not a de Polignac number, because 40730145 - 2⁷ = 40730017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40730149) 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, 3360 + ... + 9630.

It is an arithmetic number, because the mean of its divisors is an integer number (4083072).

Almost surely, 2^40730145 is an apocalyptic number.

It is an amenable number.

40730145 is a deficient number, since it is larger than the sum of its proper divisors (24599007).

40730145 is a wasteful number, since it uses less digits than its factorization.

40730145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 40730145 is about 6382.0173142980. The cubic root of 40730145 is about 344.0635389438.

Adding to 40730145 its reverse (54103704), we get a palindrome (94833849).

The spelling of 40730145 in words is "forty million, seven hundred thirty thousand, one hundred forty-five".