40450020 has 48 divisors (see below), whose sum is σ = 121974720. Its totient is φ = 9956736.

The previous prime is 40449989. The next prime is 40450027. The reversal of 40450020 is 2005404.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (40450027) 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, 25150 + ... + 26709.

It is an arithmetic number, because the mean of its divisors is an integer number (2541140).

Almost surely, 2^40450020 is an apocalyptic number.

It is an amenable number.

40450020 is an abundant number, since it is smaller than the sum of its proper divisors (81524700).

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

40450020 is a wasteful number, since it uses less digits than its factorization.

40450020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51884 (or 51882 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40450020 is about 6360.0330187822. The cubic root of 40450020 is about 343.2729483982.

Adding to 40450020 its reverse (2005404), we get a palindrome (42455424).

The spelling of 40450020 in words is "forty million, four hundred fifty thousand, twenty".