49408640 has 32 divisors (see below), whose sum is σ = 118119060. Its totient is φ = 19763200.

The previous prime is 49408603. The next prime is 49408643. The reversal of 49408640 is 4680494.

It can be written as a sum of positive squares in 2 ways, for example, as 43138624 + 6270016 = 6568^2 + 2504^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 49408640.

It is not an unprimeable number, because it can be changed into a prime (49408643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37961 + ... + 39240.

Almost surely, 2^49408640 is an apocalyptic number.

49408640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49408640 is an abundant number, since it is smaller than the sum of its proper divisors (68710420).

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

49408640 is an equidigital number, since it uses as much as digits as its factorization.

49408640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77220 (or 77208 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 49408640 is about 7029.1279686744. The cubic root of 49408640 is about 366.9449934512.

The spelling of 49408640 in words is "forty-nine million, four hundred eight thousand, six hundred forty".