40220624 has 20 divisors (see below), whose sum is σ = 78702180. Its totient is φ = 19910400.

The previous prime is 40220599. The next prime is 40220639. The reversal of 40220624 is 42602204.

It can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 22848400 = 4168^2 + 4780^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40220596 and 40220605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10829 + ... + 14060.

It is an arithmetic number, because the mean of its divisors is an integer number (3935109).

Almost surely, 2^40220624 is an apocalyptic number.

It is an amenable number.

40220624 is a deficient number, since it is larger than the sum of its proper divisors (38481556).

40220624 is a wasteful number, since it uses less digits than its factorization.

40220624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24998 (or 24992 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40220624 is about 6341.9731945192. The cubic root of 40220624 is about 342.6228064063.

Adding to 40220624 its reverse (42602204), we get a palindrome (82822828).

The spelling of 40220624 in words is "forty million, two hundred twenty thousand, six hundred twenty-four".