649280407 has 8 divisors (see below), whose sum is σ = 684162560. Its totient is φ = 614469240.

The previous prime is 649280393. The next prime is 649280413. The reversal of 649280407 is 704082946.

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 649280407 - 2¹⁵ = 649247639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649280407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649280417) 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, 1588 + ... + 36070.

It is an arithmetic number, because the mean of its divisors is an integer number (85520320).

Almost surely, 2^649280407 is an apocalyptic number.

649280407 is a deficient number, since it is larger than the sum of its proper divisors (34882153).

649280407 is a wasteful number, since it uses less digits than its factorization.

649280407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35493.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 649280407 is about 25480.9812801627. The cubic root of 649280407 is about 865.9193259747.

The spelling of 649280407 in words is "six hundred forty-nine million, two hundred eighty thousand, four hundred seven".