49728421 has 4 divisors (see below), whose sum is σ = 49790700. Its totient is φ = 49666144.

The previous prime is 49728401. The next prime is 49728431. The reversal of 49728421 is 12482794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44488900 + 5239521 = 6670^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 49728421 - 2⁵ = 49728389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49728401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29926 + ... + 31543.

It is an arithmetic number, because the mean of its divisors is an integer number (12447675).

Almost surely, 2^49728421 is an apocalyptic number.

It is an amenable number.

49728421 is a deficient number, since it is larger than the sum of its proper divisors (62279).

49728421 is an equidigital number, since it uses as much as digits as its factorization.

49728421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62278.

The product of its digits is 32256, while the sum is 37.

The square root of 49728421 is about 7051.8381291689. The cubic root of 49728421 is about 367.7349348518.

The spelling of 49728421 in words is "forty-nine million, seven hundred twenty-eight thousand, four hundred twenty-one".