620891894 has 32 divisors (see below), whose sum is σ = 1097435136. Its totient is φ = 257891040.

The previous prime is 620891893. The next prime is 620891897. The reversal of 620891894 is 498198026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620891891) 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, 138167 + ... + 142589.

It is an arithmetic number, because the mean of its divisors is an integer number (34294848).

Almost surely, 2^620891894 is an apocalyptic number.

620891894 is a deficient number, since it is larger than the sum of its proper divisors (476543242).

620891894 is a wasteful number, since it uses less digits than its factorization.

620891894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 620891894 is about 24917.7024221737. The cubic root of 620891894 is about 853.1105839836.

The spelling of 620891894 in words is "six hundred twenty million, eight hundred ninety-one thousand, eight hundred ninety-four".