40390001 has 8 divisors (see below), whose sum is σ = 42565824. Its totient is φ = 38249200.

The previous prime is 40389997. The next prime is 40390003. The reversal of 40390001 is 10009304.

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

It is a cyclic number.

It is not a de Polignac number, because 40390001 - 2² = 40389997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40390003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6371 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (5320728).

Almost surely, 2^40390001 is an apocalyptic number.

It is an amenable number.

40390001 is a deficient number, since it is larger than the sum of its proper divisors (2175823).

40390001 is a wasteful number, since it uses less digits than its factorization.

40390001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17511.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 40390001 is about 6355.3128168486. The cubic root of 40390001 is about 343.1030836486.

Adding to 40390001 its reverse (10009304), we get a palindrome (50399305).

The spelling of 40390001 in words is "forty million, three hundred ninety thousand, one".