40005545 has 16 divisors (see below), whose sum is σ = 51770880. Its totient is φ = 29577600.

The previous prime is 40005541. The next prime is 40005551. The reversal of 40005545 is 54550004.

It is not a de Polignac number, because 40005545 - 2² = 40005541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40005545.

It is not an unprimeable number, because it can be changed into a prime (40005541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241 + ... + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (3235680).

Almost surely, 2^40005545 is an apocalyptic number.

It is an amenable number.

40005545 is a deficient number, since it is larger than the sum of its proper divisors (11765335).

40005545 is a wasteful number, since it uses less digits than its factorization.

40005545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 40005545 is about 6324.9936758862. The cubic root of 40005545 is about 342.0109916329.

Adding to 40005545 its reverse (54550004), we get a palindrome (94555549).

The spelling of 40005545 in words is "forty million, five thousand, five hundred forty-five".