40229840 has 120 divisors (see below), whose sum is σ = 113385600. Its totient is φ = 13001472.

The previous prime is 40229747. The next prime is 40229863. The reversal of 40229840 is 4892204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202061 + ... + 202259.

It is an arithmetic number, because the mean of its divisors is an integer number (944880).

Almost surely, 2^40229840 is an apocalyptic number.

40229840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40229840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56692800).

40229840 is an abundant number, since it is smaller than the sum of its proper divisors (73155760).

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

40229840 is a wasteful number, since it uses less digits than its factorization.

40229840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 40229840 is about 6342.6997406467. The cubic root of 40229840 is about 342.6489735011.

The spelling of 40229840 in words is "forty million, two hundred twenty-nine thousand, eight hundred forty".