649342038 has 16 divisors (see below), whose sum is σ = 1298995056. Its totient is φ = 216395520.

The previous prime is 649342037. The next prime is 649342039. The reversal of 649342038 is 830243946.

It is an interprime number because it is at equal distance from previous prime (649342037) and next prime (649342039).

It is a junction number, because it is equal to n+sod(n) for n = 649341987 and 649342005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649342033) 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, 21058 + ... + 41738.

It is an arithmetic number, because the mean of its divisors is an integer number (81187191).

Almost surely, 2^649342038 is an apocalyptic number.

649342038 is an abundant number, since it is smaller than the sum of its proper divisors (649653018).

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

649342038 is a wasteful number, since it uses less digits than its factorization.

649342038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25919.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 649342038 is about 25482.1906044202. The cubic root of 649342038 is about 865.9467233749.

The spelling of 649342038 in words is "six hundred forty-nine million, three hundred forty-two thousand, thirty-eight".