620824649 has 8 divisors (see below), whose sum is σ = 657988128. Its totient is φ = 583732800.

The previous prime is 620824643. The next prime is 620824657. The reversal of 620824649 is 946428026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620824649 - 2¹² = 620820553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620824643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494 + ... + 35240.

It is an arithmetic number, because the mean of its divisors is an integer number (82248516).

Almost surely, 2^620824649 is an apocalyptic number.

It is an amenable number.

620824649 is a deficient number, since it is larger than the sum of its proper divisors (37163479).

620824649 is a wasteful number, since it uses less digits than its factorization.

620824649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35815.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 620824649 is about 24916.3530437341. The cubic root of 620824649 is about 853.0797844767.

The spelling of 620824649 in words is "six hundred twenty million, eight hundred twenty-four thousand, six hundred forty-nine".