49886640 has 120 divisors (see below), whose sum is σ = 168873120. Its totient is φ = 13197312.

The previous prime is 49886611. The next prime is 49886651. The reversal of 49886640 is 4668894.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138781 + ... + 139139.

It is an arithmetic number, because the mean of its divisors is an integer number (1407276).

Almost surely, 2^49886640 is an apocalyptic number.

49886640 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 49886640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84436560).

49886640 is an abundant number, since it is smaller than the sum of its proper divisors (118986480).

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

49886640 is a wasteful number, since it uses less digits than its factorization.

49886640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 49886640 is about 7063.0475009021. The cubic root of 49886640 is about 368.1245246510.

It can be divided in two parts, 4988 and 6640, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 49886640 in words is "forty-nine million, eight hundred eighty-six thousand, six hundred forty".