52729690 has 48 divisors (see below), whose sum is σ = 105421176. Its totient is φ = 18969600.

The previous prime is 52729687. The next prime is 52729697. The reversal of 52729690 is 9692725.

It is a happy number.

52729690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 22819729 + 29909961 = 4777^2 + 5469^2 .

It is a super-2 number, since 2×52729690² = 5560840414992200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52729697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68910 + ... + 69670.

Almost surely, 2^52729690 is an apocalyptic number.

52729690 is a deficient number, since it is larger than the sum of its proper divisors (52691486).

52729690 is a wasteful number, since it uses less digits than its factorization.

52729690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 52729690 is about 7261.5211904945. The cubic root of 52729690 is about 374.9888944859.

The spelling of 52729690 in words is "fifty-two million, seven hundred twenty-nine thousand, six hundred ninety".