40621637 has 6 divisors (see below), whose sum is σ = 47253798. Its totient is φ = 34818504.

The previous prime is 40621621. The next prime is 40621667. The reversal of 40621637 is 73612604.

It can be written as a sum of positive squares in only one way, i.e., 29658916 + 10962721 = 5446^2 + 3311^2 .

It is not a de Polignac number, because 40621637 - 2⁴ = 40621621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40621667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 414458 + ... + 414555.

It is an arithmetic number, because the mean of its divisors is an integer number (7875633).

Almost surely, 2^40621637 is an apocalyptic number.

It is an amenable number.

40621637 is a deficient number, since it is larger than the sum of its proper divisors (6632161).

40621637 is an equidigital number, since it uses as much as digits as its factorization.

40621637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829027 (or 829020 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 40621637 is about 6373.5105711060. The cubic root of 40621637 is about 343.7577306471.

The spelling of 40621637 in words is "forty million, six hundred twenty-one thousand, six hundred thirty-seven".