40288040 has 32 divisors (see below), whose sum is σ = 97622280. Its totient is φ = 14875392.

The previous prime is 40288021. The next prime is 40288051. The reversal of 40288040 is 4088204.

It can be written as a sum of positive squares in 4 ways, for example, as 32878756 + 7409284 = 5734^2 + 2722^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38219 + ... + 39258.

Almost surely, 2^40288040 is an apocalyptic number.

40288040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40288040 is an abundant number, since it is smaller than the sum of its proper divisors (57334240).

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

40288040 is a wasteful number, since it uses less digits than its factorization.

40288040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77501 (or 77497 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 40288040 is about 6347.2860342039. The cubic root of 40288040 is about 342.8141291938.

The spelling of 40288040 in words is "forty million, two hundred eighty-eight thousand, forty".