40509450 has 96 divisors (see below), whose sum is σ = 114784320. Its totient is φ = 10497600.

The previous prime is 40509409. The next prime is 40509461. The reversal of 40509450 is 5490504.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49545 + ... + 50355.

It is an arithmetic number, because the mean of its divisors is an integer number (1195670).

Almost surely, 2^40509450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40509450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57392160).

40509450 is an abundant number, since it is smaller than the sum of its proper divisors (74274870).

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

40509450 is a wasteful number, since it uses less digits than its factorization.

40509450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40509450 is about 6364.7034494939. The cubic root of 40509450 is about 343.4409806878.

Adding to 40509450 its reverse (5490504), we get a palindrome (45999954).

The spelling of 40509450 in words is "forty million, five hundred nine thousand, four hundred fifty".