40091007 has 32 divisors (see below), whose sum is σ = 62853120. Its totient is φ = 22468320.

The previous prime is 40091003. The next prime is 40091027. The reversal of 40091007 is 70019004.

It is not a de Polignac number, because 40091007 - 2² = 40091003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40091003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26218 + ... + 27704.

It is an arithmetic number, because the mean of its divisors is an integer number (1964160).

Almost surely, 2^40091007 is an apocalyptic number.

40091007 is a deficient number, since it is larger than the sum of its proper divisors (22762113).

40091007 is a wasteful number, since it uses less digits than its factorization.

40091007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 40091007 is about 6331.7459677407. The cubic root of 40091007 is about 342.2543591840.

The spelling of 40091007 in words is "forty million, ninety-one thousand, seven".