40620669 has 4 divisors (see below), whose sum is σ = 54160896. Its totient is φ = 27080444.

The previous prime is 40620647. The next prime is 40620673. The reversal of 40620669 is 96602604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40620669 - 2¹² = 40616573 is a prime.

It is a super-2 number, since 2×40620669² = 3300077500015122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40620169) 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, 6770109 + ... + 6770114.

It is an arithmetic number, because the mean of its divisors is an integer number (13540224).

Almost surely, 2^40620669 is an apocalyptic number.

It is an amenable number.

40620669 is a deficient number, since it is larger than the sum of its proper divisors (13540227).

40620669 is a wasteful number, since it uses less digits than its factorization.

40620669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540226.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40620669 is about 6373.4346313428. The cubic root of 40620669 is about 343.7550000815.

The spelling of 40620669 in words is "forty million, six hundred twenty thousand, six hundred sixty-nine".