40503645 has 120 divisors (see below), whose sum is σ = 91536984. Its totient is φ = 16982784.

The previous prime is 40503601. The next prime is 40503653. The reversal of 40503645 is 54630504.

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 40487769 = 126^2 + 6363^2 .

It is not a de Polignac number, because 40503645 - 2⁶ = 40503581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

40503645 is a modest number, since divided by 3645 gives 405 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 257907 + ... + 258063.

Almost surely, 2^40503645 is an apocalyptic number.

40503645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40503645 is an abundant number, since it is smaller than the sum of its proper divisors (51033339).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40503645 is a wasteful number, since it uses less digits than its factorization.

40503645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40503645 is about 6364.2474024821. The cubic root of 40503645 is about 343.4245748851.

The spelling of 40503645 in words is "forty million, five hundred three thousand, six hundred forty-five".