649441692 has 48 divisors (see below), whose sum is σ = 1738060800. Its totient is φ = 209496240.

The previous prime is 649441691. The next prime is 649441697. The reversal of 649441692 is 296144946.

649441692 is a `hidden beast` number, since 64 + 94 + 416 + 92 = 666.

It is a super-2 number, since 2×649441692² = 843549022615645728, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649441691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93642 + ... + 100337.

It is an arithmetic number, because the mean of its divisors is an integer number (36209600).

Almost surely, 2^649441692 is an apocalyptic number.

649441692 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

649441692 is an abundant number, since it is smaller than the sum of its proper divisors (1088619108).

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

649441692 is a wasteful number, since it uses less digits than its factorization.

649441692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194023 (or 194015 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 649441692 is about 25484.1458950462. The cubic root of 649441692 is about 865.9910198245.

The spelling of 649441692 in words is "six hundred forty-nine million, four hundred forty-one thousand, six hundred ninety-two".