620718849 has 16 divisors (see below), whose sum is σ = 932538240. Its totient is φ = 407982960.

The previous prime is 620718827. The next prime is 620718851. The reversal of 620718849 is 948817026.

620718849 is a `hidden beast` number, since 620 + 7 + 18 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 620718849 - 2¹⁷ = 620587777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620718869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159982 + ... + 163815.

It is an arithmetic number, because the mean of its divisors is an integer number (58283640).

Almost surely, 2^620718849 is an apocalyptic number.

It is an amenable number.

620718849 is a deficient number, since it is larger than the sum of its proper divisors (311819391).

620718849 is a wasteful number, since it uses less digits than its factorization.

620718849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323877 (or 323871 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 620718849 is about 24914.2298496261. The cubic root of 620718849 is about 853.0313215337.

The spelling of 620718849 in words is "six hundred twenty million, seven hundred eighteen thousand, eight hundred forty-nine".