620649148 has 24 divisors (see below), whose sum is σ = 1241856000. Its totient is φ = 265873008.

The previous prime is 620649119. The next prime is 620649149. The reversal of 620649148 is 841946026.

It is a self number, because there is not a number n which added to its sum of digits gives 620649148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620649149) 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, 90753 + ... + 97351.

It is an arithmetic number, because the mean of its divisors is an integer number (51744000).

Almost surely, 2^620649148 is an apocalyptic number.

It is an amenable number.

620649148 is an abundant number, since it is smaller than the sum of its proper divisors (621206852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620649148 is a wasteful number, since it uses less digits than its factorization.

620649148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969 (or 9967 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 620649148 is about 24912.8309912784. The cubic root of 620649148 is about 852.9993911561. Note that the first 3 decimals are identical.

The spelling of 620649148 in words is "six hundred twenty million, six hundred forty-nine thousand, one hundred forty-eight".