40377621 has 4 divisors (see below), whose sum is σ = 53836832. Its totient is φ = 26918412.

The previous prime is 40377613. The next prime is 40377637. The reversal of 40377621 is 12677304.

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 not a de Polignac number, because 40377621 - 2³ = 40377613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40377721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6729601 + ... + 6729606.

It is an arithmetic number, because the mean of its divisors is an integer number (13459208).

Almost surely, 2^40377621 is an apocalyptic number.

It is an amenable number.

40377621 is a deficient number, since it is larger than the sum of its proper divisors (13459211).

40377621 is a wasteful number, since it uses less digits than its factorization.

40377621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13459210.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 40377621 is about 6354.3387539539. The cubic root of 40377621 is about 343.0680250522.

The spelling of 40377621 in words is "forty million, three hundred seventy-seven thousand, six hundred twenty-one".