49681000 has 32 divisors (see below), whose sum is σ = 116255880. Its totient is φ = 19872000.

The previous prime is 49680979. The next prime is 49681007. The reversal of 49681000 is 18694.

It can be written as a sum of positive squares in 4 ways, for example, as 21399876 + 28281124 = 4626^2 + 5318^2 .

It is a super-2 number, since 2×49681000² = 4936403522000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49681000.

It is not an unprimeable number, because it can be changed into a prime (49681007) 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, 23841 + ... + 25840.

Almost surely, 2^49681000 is an apocalyptic number.

49681000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49681000 is an abundant number, since it is smaller than the sum of its proper divisors (66574880).

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

49681000 is a wasteful number, since it uses less digits than its factorization.

49681000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49702 (or 49688 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 49681000 is about 7048.4750123697. The cubic root of 49681000 is about 367.6180070534.

Adding to 49681000 its reverse (18694), we get a palindrome (49699694).

The spelling of 49681000 in words is "forty-nine million, six hundred eighty-one thousand".