40508420 has 12 divisors (see below), whose sum is σ = 85067724. Its totient is φ = 16203360.

The previous prime is 40508417. The next prime is 40508431. The reversal of 40508420 is 2480504.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 16144324 = 4936^2 + 4018^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1012691 + ... + 1012730.

It is an arithmetic number, because the mean of its divisors is an integer number (7088977).

Almost surely, 2^40508420 is an apocalyptic number.

It is an amenable number.

40508420 is an abundant number, since it is smaller than the sum of its proper divisors (44559304).

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

40508420 is a wasteful number, since it uses less digits than its factorization.

40508420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025430 (or 2025428 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40508420 is about 6364.6225339764. The cubic root of 40508420 is about 343.4380698674.

Adding to 40508420 its reverse (2480504), we get a palindrome (42988924).

The spelling of 40508420 in words is "forty million, five hundred eight thousand, four hundred twenty".