40909020 has 48 divisors (see below), whose sum is σ = 115159968. Its totient is φ = 10850560.

The previous prime is 40909009. The next prime is 40909031. The reversal of 40909020 is 2090904.

It is an interprime number because it is at equal distance from previous prime (40909009) and next prime (40909031).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10090 + ... + 13550.

It is an arithmetic number, because the mean of its divisors is an integer number (2399166).

Almost surely, 2^40909020 is an apocalyptic number.

It is an amenable number.

40909020 is an abundant number, since it is smaller than the sum of its proper divisors (74250948).

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

40909020 is a wasteful number, since it uses less digits than its factorization.

40909020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 40909020 is about 6396.0159474473. The cubic root of 40909020 is about 344.5664792083.

Adding to 40909020 its reverse (2090904), we get a palindrome (42999924).

The spelling of 40909020 in words is "forty million, nine hundred nine thousand, twenty".