40223820 has 192 divisors, whose sum is σ = 142248960. Its totient is φ = 8266752.

The previous prime is 40223789. The next prime is 40223831. The reversal of 40223820 is 2832204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 289311 + ... + 289449.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^40223820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40223820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71124480).

40223820 is an abundant number, since it is smaller than the sum of its proper divisors (102025140).

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

40223820 is a wasteful number, since it uses less digits than its factorization.

40223820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40223820 is about 6342.2251615659. The cubic root of 40223820 is about 342.6318812985.

The spelling of 40223820 in words is "forty million, two hundred twenty-three thousand, eight hundred twenty".