40342020 has 48 divisors (see below), whose sum is σ = 119605248. Its totient is φ = 10124800.

The previous prime is 40342013. The next prime is 40342021. The reversal of 40342020 is 2024304.

It is a happy number.

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 (40342021) 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, 18756 + ... + 20795.

It is an arithmetic number, because the mean of its divisors is an integer number (2491776).

Almost surely, 2^40342020 is an apocalyptic number.

It is an amenable number.

40342020 is an abundant number, since it is smaller than the sum of its proper divisors (79263228).

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

40342020 is a wasteful number, since it uses less digits than its factorization.

40342020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39580 (or 39578 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40342020 is about 6351.5368219038. The cubic root of 40342020 is about 342.9671675657.

Adding to 40342020 its reverse (2024304), we get a palindrome (42366324).

The spelling of 40342020 in words is "forty million, three hundred forty-two thousand, twenty".