620704742 has 32 divisors (see below), whose sum is σ = 1091135232. Its totient is φ = 259275744.

The previous prime is 620704739. The next prime is 620704757. The reversal of 620704742 is 247407026.

It is a junction number, because it is equal to n+sod(n) for n = 620704699 and 620704708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406793 + ... + 408315.

It is an arithmetic number, because the mean of its divisors is an integer number (34097976).

Almost surely, 2^620704742 is an apocalyptic number.

620704742 is a deficient number, since it is larger than the sum of its proper divisors (470430490).

620704742 is a wasteful number, since it uses less digits than its factorization.

620704742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 620704742 is about 24913.9467367176. The cubic root of 620704742 is about 853.0248592392.

The spelling of 620704742 in words is "six hundred twenty million, seven hundred four thousand, seven hundred forty-two".