40821604 has 6 divisors (see below), whose sum is σ = 71437814. Its totient is φ = 20410800.

The previous prime is 40821587. The next prime is 40821611. The reversal of 40821604 is 40612804.

It can be written as a sum of positive squares in only one way, i.e., 31809600 + 9012004 = 5640^2 + 3002^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102697 + ... + 5102704.

Almost surely, 2^40821604 is an apocalyptic number.

It is an amenable number.

40821604 is a deficient number, since it is larger than the sum of its proper divisors (30616210).

40821604 is a wasteful number, since it uses less digits than its factorization.

40821604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10205405 (or 10205403 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 40821604 is about 6389.1786639599. The cubic root of 40821604 is about 344.3208764605.

The spelling of 40821604 in words is "forty million, eight hundred twenty-one thousand, six hundred four".