40629397 has 4 divisors (see below), whose sum is σ = 40646476. Its totient is φ = 40612320.

The previous prime is 40629383. The next prime is 40629427. The reversal of 40629397 is 79392604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27604516 + 13024881 = 5254^2 + 3609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40629397 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40629307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254 + ... + 9967.

It is an arithmetic number, because the mean of its divisors is an integer number (10161619).

Almost surely, 2^40629397 is an apocalyptic number.

It is an amenable number.

40629397 is a deficient number, since it is larger than the sum of its proper divisors (17079).

40629397 is a wasteful number, since it uses less digits than its factorization.

40629397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17078.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 40629397 is about 6374.1193117167. The cubic root of 40629397 is about 343.7796187371.

The spelling of 40629397 in words is "forty million, six hundred twenty-nine thousand, three hundred ninety-seven".