40007146 has 8 divisors (see below), whose sum is σ = 60057540. Its totient is φ = 19987968.

The previous prime is 40007129. The next prime is 40007147. The reversal of 40007146 is 64170004.

It can be written as a sum of positive squares in 2 ways, for example, as 40005625 + 1521 = 6325^2 + 39^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40007147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281 + ... + 9916.

Almost surely, 2^40007146 is an apocalyptic number.

40007146 is a deficient number, since it is larger than the sum of its proper divisors (20050394).

40007146 is a wasteful number, since it uses less digits than its factorization.

40007146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15608.

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

The square root of 40007146 is about 6325.1202360113. The cubic root of 40007146 is about 342.0155539362.

The spelling of 40007146 in words is "forty million, seven thousand, one hundred forty-six".