40289808 has 40 divisors (see below), whose sum is σ = 112090048. Its totient is φ = 12396672.

The previous prime is 40289807. The next prime is 40289819. The reversal of 40289808 is 80898204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (40289803) 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, 31660 + ... + 32907.

Almost surely, 2^40289808 is an apocalyptic number.

40289808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40289808 is an abundant number, since it is smaller than the sum of its proper divisors (71800240).

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

40289808 is a wasteful number, since it uses less digits than its factorization.

40289808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64591 (or 64585 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 40289808 is about 6347.4253047988. The cubic root of 40289808 is about 342.8191438046.

The spelling of 40289808 in words is "forty million, two hundred eighty-nine thousand, eight hundred eight".