49897728 has 72 divisors (see below), whose sum is σ = 147576800. Its totient is φ = 16630272.

The previous prime is 49897681. The next prime is 49897747. The reversal of 49897728 is 82779894.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3303 + ... + 10521.

Almost surely, 2^49897728 is an apocalyptic number.

49897728 is a gapful number since it is divisible by the number (48) 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 49897728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73788400).

49897728 is an abundant number, since it is smaller than the sum of its proper divisors (97679072).

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

49897728 is an equidigital number, since it uses as much as digits as its factorization.

49897728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244 (or 7224 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 49897728 is about 7063.8323875924. The cubic root of 49897728 is about 368.1517962302.

It can be divided in two parts, 49897 and 728, that added together give a 4-th power (50625 = 15⁴).

The spelling of 49897728 in words is "forty-nine million, eight hundred ninety-seven thousand, seven hundred twenty-eight".