649019472 has 80 divisors (see below), whose sum is σ = 1832596992. Its totient is φ = 197038080.

The previous prime is 649019471. The next prime is 649019473. The reversal of 649019472 is 274910946.

It is an interprime number because it is at equal distance from previous prime (649019471) and next prime (649019473).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649019471) 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, 12468 + ... + 38124.

Almost surely, 2^649019472 is an apocalyptic number.

649019472 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649019472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916298496).

649019472 is an abundant number, since it is smaller than the sum of its proper divisors (1183577520).

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

649019472 is a wasteful number, since it uses less digits than its factorization.

649019472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25716 (or 25710 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 649019472 is about 25475.8605742770. The cubic root of 649019472 is about 865.8033109053.

The spelling of 649019472 in words is "six hundred forty-nine million, nineteen thousand, four hundred seventy-two".