40868220 has 24 divisors (see below), whose sum is σ = 114431184. Its totient is φ = 10898176.

The previous prime is 40868213. The next prime is 40868227. The reversal of 40868220 is 2286804.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40868213) and next prime (40868227).

It is a super-2 number, since 2×40868220² = 3340422811936800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40868227) 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, 340509 + ... + 340628.

It is an arithmetic number, because the mean of its divisors is an integer number (4767966).

Almost surely, 2^40868220 is an apocalyptic number.

It is an amenable number.

40868220 is an abundant number, since it is smaller than the sum of its proper divisors (73562964).

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

40868220 is a wasteful number, since it uses less digits than its factorization.

40868220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681149 (or 681147 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 40868220 is about 6392.8256663231. The cubic root of 40868220 is about 344.4518916955.

The spelling of 40868220 in words is "forty million, eight hundred sixty-eight thousand, two hundred twenty".