40304145 has 32 divisors (see below), whose sum is σ = 75276288. Its totient is φ = 18030528.

The previous prime is 40304129. The next prime is 40304183. The reversal of 40304145 is 54140304.

It is not a de Polignac number, because 40304145 - 2⁴ = 40304129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 852 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (2352384).

Almost surely, 2^40304145 is an apocalyptic number.

It is an amenable number.

40304145 is a deficient number, since it is larger than the sum of its proper divisors (34972143).

40304145 is a wasteful number, since it uses less digits than its factorization.

40304145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8229.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40304145 is about 6348.5545598979. The cubic root of 40304145 is about 342.8598026827.

Adding to 40304145 its reverse (54140304), we get a palindrome (94444449).

The spelling of 40304145 in words is "forty million, three hundred four thousand, one hundred forty-five".