649652420 has 12 divisors (see below), whose sum is σ = 1364270124. Its totient is φ = 259860960.

The previous prime is 649652407. The next prime is 649652441. The reversal of 649652420 is 24256946.

It can be written as a sum of positive squares in 2 ways, for example, as 168376576 + 481275844 = 12976^2 + 21938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16241291 + ... + 16241330.

It is an arithmetic number, because the mean of its divisors is an integer number (113689177).

Almost surely, 2^649652420 is an apocalyptic number.

It is an amenable number.

649652420 is an abundant number, since it is smaller than the sum of its proper divisors (714617704).

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

649652420 is a wasteful number, since it uses less digits than its factorization.

649652420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32482630 (or 32482628 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 649652420 is about 25488.2800518199. The cubic root of 649652420 is about 866.0846740220.

The spelling of 649652420 in words is "six hundred forty-nine million, six hundred fifty-two thousand, four hundred twenty".