649393542 has 24 divisors (see below), whose sum is σ = 1608022416. Its totient is φ = 185540976.

The previous prime is 649393541. The next prime is 649393543. The reversal of 649393542 is 245393946.

It is an interprime number because it is at equal distance from previous prime (649393541) and next prime (649393543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649393541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2576833 + ... + 2577084.

It is an arithmetic number, because the mean of its divisors is an integer number (67000934).

Almost surely, 2^649393542 is an apocalyptic number.

649393542 is an abundant number, since it is smaller than the sum of its proper divisors (958628874).

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

649393542 is a wasteful number, since it uses less digits than its factorization.

649393542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153932 (or 5153929 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 649393542 is about 25483.2011725372. The cubic root of 649393542 is about 865.9696175962.

The spelling of 649393542 in words is "six hundred forty-nine million, three hundred ninety-three thousand, five hundred forty-two".