40620290 has 16 divisors (see below), whose sum is σ = 76965120. Its totient is φ = 15392880.

The previous prime is 40620289. The next prime is 40620301. The reversal of 40620290 is 9202604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106706 + ... + 107085.

It is an arithmetic number, because the mean of its divisors is an integer number (4810320).

Almost surely, 2^40620290 is an apocalyptic number.

40620290 is a deficient number, since it is larger than the sum of its proper divisors (36344830).

40620290 is a wasteful number, since it uses less digits than its factorization.

40620290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213817.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40620290 is about 6373.4048984824. The cubic root of 40620290 is about 343.7539309743.

Adding to 40620290 its reverse (9202604), we get a palindrome (49822894).

The spelling of 40620290 in words is "forty million, six hundred twenty thousand, two hundred ninety".