40109420 has 24 divisors (see below), whose sum is σ = 90709584. Its totient is φ = 14809536.

The previous prime is 40109417. The next prime is 40109429. The reversal of 40109420 is 2490104.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40109392 and 40109401.

It is not an unprimeable number, because it can be changed into a prime (40109429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76874 + ... + 77393.

It is an arithmetic number, because the mean of its divisors is an integer number (3779566).

Almost surely, 2^40109420 is an apocalyptic number.

It is an amenable number.

40109420 is an abundant number, since it is smaller than the sum of its proper divisors (50600164).

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

40109420 is a wasteful number, since it uses less digits than its factorization.

40109420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154289 (or 154287 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40109420 is about 6333.1998231542. The cubic root of 40109420 is about 342.3067480317.

Adding to 40109420 its reverse (2490104), we get a palindrome (42599524).

The spelling of 40109420 in words is "forty million, one hundred nine thousand, four hundred twenty".