40220994 has 32 divisors (see below), whose sum is σ = 88547904. Its totient is φ = 12078080.

The previous prime is 40220987. The next prime is 40221001. The reversal of 40220994 is 49902204.

It is an interprime number because it is at equal distance from previous prime (40220987) and next prime (40221001).

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, 4762 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (2767122).

Almost surely, 2^40220994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40220994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44273952).

40220994 is an abundant number, since it is smaller than the sum of its proper divisors (48326910).

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

40220994 is a wasteful number, since it uses less digits than its factorization.

40220994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40220994 is about 6342.0023651840. The cubic root of 40220994 is about 342.6238570286.

Subtracting from 40220994 its sum of digits (30), we obtain a square (40220964 = 6342²).

It can be divided in two parts, 40220 and 994, that added together give a palindrome (41214).

The spelling of 40220994 in words is "forty million, two hundred twenty thousand, nine hundred ninety-four".