49278656 has 56 divisors (see below), whose sum is σ = 115641120. Its totient is φ = 20385792.

The previous prime is 49278653. The next prime is 49278659. The reversal of 49278656 is 65687294.

It is an interprime number because it is at equal distance from previous prime (49278653) and next prime (49278659).

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 49278656.

It is not an unprimeable number, because it can be changed into a prime (49278653) 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, 11096 + ... + 14888.

It is an arithmetic number, because the mean of its divisors is an integer number (2065020).

Almost surely, 2^49278656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49278656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57820560).

49278656 is an abundant number, since it is smaller than the sum of its proper divisors (66362464).

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

49278656 is a wasteful number, since it uses less digits than its factorization.

49278656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3831 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 49278656 is about 7019.8757823768. The cubic root of 49278656 is about 366.6229251769.

The spelling of 49278656 in words is "forty-nine million, two hundred seventy-eight thousand, six hundred fifty-six".