40022840 has 64 divisors (see below), whose sum is σ = 105809760. Its totient is φ = 13432320.

The previous prime is 40022839. The next prime is 40022861. The reversal of 40022840 is 4822004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2222 + ... + 9218.

Almost surely, 2^40022840 is an apocalyptic number.

40022840 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 40022840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52904880).

40022840 is an abundant number, since it is smaller than the sum of its proper divisors (65786920).

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

40022840 is a wasteful number, since it uses less digits than its factorization.

40022840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032 (or 7028 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40022840 is about 6326.3607231962. The cubic root of 40022840 is about 342.0602700343.

Adding to 40022840 its reverse (4822004), we get a palindrome (44844844).

The spelling of 40022840 in words is "forty million, twenty-two thousand, eight hundred forty".