52780690 has 32 divisors (see below), whose sum is σ = 97666560. Its totient is φ = 20529600.

The previous prime is 52780669. The next prime is 52780697. The reversal of 52780690 is 9608725.

52780690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×52780690² = 5571602473752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52780697) 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 15 ways as a sum of consecutive naturals, for example, 55620 + ... + 56560.

It is an arithmetic number, because the mean of its divisors is an integer number (3052080).

Almost surely, 2^52780690 is an apocalyptic number.

52780690 is a deficient number, since it is larger than the sum of its proper divisors (44885870).

52780690 is a wasteful number, since it uses less digits than its factorization.

52780690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 52780690 is about 7265.0320026824. The cubic root of 52780690 is about 375.1097515795.

The spelling of 52780690 in words is "fifty-two million, seven hundred eighty thousand, six hundred ninety".