49442640 has 240 divisors, whose sum is σ = 176452992. Its totient is φ = 11421696.

The previous prime is 49442633. The next prime is 49442669. The reversal of 49442640 is 4624494.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 932854 + ... + 932906.

Almost surely, 2^49442640 is an apocalyptic number.

49442640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49442640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88226496).

49442640 is an abundant number, since it is smaller than the sum of its proper divisors (127010352).

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

49442640 is a wasteful number, since it uses less digits than its factorization.

49442640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 49442640 is about 7031.5460604337. The cubic root of 49442640 is about 367.0291438421.

It can be divided in two parts, 494 and 42640, that added together give a palindrome (43134).

The spelling of 49442640 in words is "forty-nine million, four hundred forty-two thousand, six hundred forty".