620747765 has 32 divisors (see below), whose sum is σ = 858816000. Its totient is φ = 425977920.

The previous prime is 620747737. The next prime is 620747783. The reversal of 620747765 is 567747026.

It is not a de Polignac number, because 620747765 - 2¹⁴ = 620731381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294686 + ... + 296784.

It is an arithmetic number, because the mean of its divisors is an integer number (26838000).

Almost surely, 2^620747765 is an apocalyptic number.

It is an amenable number.

620747765 is a deficient number, since it is larger than the sum of its proper divisors (238068235).

620747765 is a wasteful number, since it uses less digits than its factorization.

620747765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417.

The product of its (nonzero) digits is 493920, while the sum is 44.

The square root of 620747765 is about 24914.8101538021. The cubic root of 620747765 is about 853.0445673968.

The spelling of 620747765 in words is "six hundred twenty million, seven hundred forty-seven thousand, seven hundred sixty-five".