649157862 has 16 divisors (see below), whose sum is σ = 1302242112. Its totient is φ = 215731560.

The previous prime is 649157813. The next prime is 649157867. The reversal of 649157862 is 268751946.

It is a super-2 number, since 2×649157862² = 842811859592822088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649157867) 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, 161448 + ... + 165419.

It is an arithmetic number, because the mean of its divisors is an integer number (81390132).

Almost surely, 2^649157862 is an apocalyptic number.

649157862 is an abundant number, since it is smaller than the sum of its proper divisors (653084250).

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

649157862 is a wasteful number, since it uses less digits than its factorization.

649157862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327203.

The product of its digits is 725760, while the sum is 48.

The square root of 649157862 is about 25478.5765300968. The cubic root of 649157862 is about 865.8648447575.

The spelling of 649157862 in words is "six hundred forty-nine million, one hundred fifty-seven thousand, eight hundred sixty-two".