40720052 has 12 divisors (see below), whose sum is σ = 72998436. Its totient is φ = 19863360.

The previous prime is 40720039. The next prime is 40720063. The reversal of 40720052 is 25002704.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 17255716 = 4844^2 + 4154^2 .

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, 123983 + ... + 124310.

It is an arithmetic number, because the mean of its divisors is an integer number (6083203).

Almost surely, 2^40720052 is an apocalyptic number.

It is an amenable number.

40720052 is a deficient number, since it is larger than the sum of its proper divisors (32278384).

40720052 is a wasteful number, since it uses less digits than its factorization.

40720052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248338 (or 248336 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 40720052 is about 6381.2265278706. The cubic root of 40720052 is about 344.0351167504.

Adding to 40720052 its reverse (25002704), we get a palindrome (65722756).

The spelling of 40720052 in words is "forty million, seven hundred twenty thousand, fifty-two".