40263840 has 72 divisors (see below), whose sum is σ = 137405268. Its totient is φ = 10736640.

The previous prime is 40263829. The next prime is 40263841. The reversal of 40263840 is 4836204.

It can be written as a sum of positive squares in 2 ways, for example, as 38489616 + 1774224 = 6204^2 + 1332^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (40263841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12541 + ... + 15420.

Almost surely, 2^40263840 is an apocalyptic number.

40263840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40263840 is an abundant number, since it is smaller than the sum of its proper divisors (97141428).

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

40263840 is a wasteful number, since it uses less digits than its factorization.

40263840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27982 (or 27971 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40263840 is about 6345.3794212797. The cubic root of 40263840 is about 342.7454755391.

The spelling of 40263840 in words is "forty million, two hundred sixty-three thousand, eight hundred forty".