40620291 has 16 divisors (see below), whose sum is σ = 55324800. Its totient is φ = 26503488.

The previous prime is 40620289. The next prime is 40620301. The reversal of 40620291 is 19202604.

It is not a de Polignac number, because 40620291 - 2¹ = 40620289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40620991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35415 + ... + 36543.

It is an arithmetic number, because the mean of its divisors is an integer number (3457800).

Almost surely, 2^40620291 is an apocalyptic number.

40620291 is a deficient number, since it is larger than the sum of its proper divisors (14704509).

40620291 is a wasteful number, since it uses less digits than its factorization.

40620291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 40620291 is about 6373.4049769334. The cubic root of 40620291 is about 343.7539337952.

Adding to 40620291 its reverse (19202604), we get a palindrome (59822895).

The spelling of 40620291 in words is "forty million, six hundred twenty thousand, two hundred ninety-one".