40203345 has 32 divisors (see below), whose sum is σ = 79172352. Its totient is φ = 16964352.

The previous prime is 40203343. The next prime is 40203389. The reversal of 40203345 is 54330204.

It is a happy number.

It is not a de Polignac number, because 40203345 - 2¹ = 40203343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40203343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13362 + ... + 16091.

It is an arithmetic number, because the mean of its divisors is an integer number (2474136).

Almost surely, 2^40203345 is an apocalyptic number.

It is an amenable number.

40203345 is a deficient number, since it is larger than the sum of its proper divisors (38969007).

40203345 is a wasteful number, since it uses less digits than its factorization.

40203345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29481.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 40203345 is about 6340.6107749964. The cubic root of 40203345 is about 342.5737351682.

Adding to 40203345 its reverse (54330204), we get a palindrome (94533549).

The spelling of 40203345 in words is "forty million, two hundred three thousand, three hundred forty-five".