40361691 has 8 divisors (see below), whose sum is σ = 53945104. Its totient is φ = 26843040.

The previous prime is 40361677. The next prime is 40361701. The reversal of 40361691 is 19616304.

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

It is not a de Polignac number, because 40361691 - 2¹¹ = 40359643 is a prime.

It is a super-2 number, since 2×40361691² = 3258132200758962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40361611) 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, 14716 + ... + 17241.

It is an arithmetic number, because the mean of its divisors is an integer number (6743138).

Almost surely, 2^40361691 is an apocalyptic number.

40361691 is a deficient number, since it is larger than the sum of its proper divisors (13583413).

40361691 is a wasteful number, since it uses less digits than its factorization.

40361691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32381.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40361691 is about 6353.0851560482. The cubic root of 40361691 is about 343.0229027595.

Adding to 40361691 its reverse (19616304), we get a palindrome (59977995).

The spelling of 40361691 in words is "forty million, three hundred sixty-one thousand, six hundred ninety-one".