649072 has 20 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 320768.

The previous prime is 649069. The next prime is 649073. The reversal of 649072 is 270946.

It is a super-2 number, since 2×649072² = 842588922368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (63612).

2⁶⁴⁹⁰⁷² is an apocalyptic number.

It is an amenable number.

649072 is a deficient number, since it is larger than the sum of its proper divisors (623168).

649072 is a wasteful number, since it uses less digits than its factorization.

649072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 649072 is about 805.6500480978. The cubic root of 649072 is about 86.5826668032.

The spelling of 649072 in words is "six hundred forty-nine thousand, seventy-two".