40220240 has 40 divisors (see below), whose sum is σ = 93931488. Its totient is φ = 16016000.

The previous prime is 40220239. The next prime is 40220263. The reversal of 40220240 is 4202204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 19079 + ... + 21081.

Almost surely, 2^40220240 is an apocalyptic number.

40220240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40220240 is an abundant number, since it is smaller than the sum of its proper divisors (53711248).

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

40220240 is a wasteful number, since it uses less digits than its factorization.

40220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2261 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40220240 is about 6341.9429199576. The cubic root of 40220240 is about 342.6217160239.

Adding to 40220240 its reverse (4202204), we get a palindrome (44422444).

The spelling of 40220240 in words is "forty million, two hundred twenty thousand, two hundred forty".