49321728 has 54 divisors (see below), whose sum is σ = 142213344. Its totient is φ = 16439808.

The previous prime is 49321717. The next prime is 49321759. The reversal of 49321728 is 82712394.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 49321692 and 49321701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8400 + ... + 13007.

Almost surely, 2^49321728 is an apocalyptic number.

49321728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

49321728 is an abundant number, since it is smaller than the sum of its proper divisors (92891616).

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

49321728 is a wasteful number, since it uses less digits than its factorization.

49321728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21429 (or 21412 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 49321728 is about 7022.9429728569. The cubic root of 49321728 is about 366.7297096376.

The spelling of 49321728 in words is "forty-nine million, three hundred twenty-one thousand, seven hundred twenty-eight".