40203612 has 36 divisors (see below), whose sum is σ = 103792416. Its totient is φ = 13115520.

The previous prime is 40203607. The next prime is 40203619. The reversal of 40203612 is 21630204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40203619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10189 + ... + 13572.

Almost surely, 2^40203612 is an apocalyptic number.

It is an amenable number.

40203612 is an abundant number, since it is smaller than the sum of its proper divisors (63588804).

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

40203612 is a wasteful number, since it uses less digits than its factorization.

40203612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23818 (or 23813 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40203612 is about 6340.6318297154. The cubic root of 40203612 is about 342.5744935378.

Adding to 40203612 its reverse (21630204), we get a palindrome (61833816).

The spelling of 40203612 in words is "forty million, two hundred three thousand, six hundred twelve".