49571820 has 36 divisors (see below), whose sum is σ = 150368400. Its totient is φ = 13219104.

The previous prime is 49571777. The next prime is 49571839. The reversal of 49571820 is 2817594.

49571820 is a `hidden beast` number, since 4 + 9 + 571 + 82 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×49571820² = 4914730676224800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137520 + ... + 137879.

It is an arithmetic number, because the mean of its divisors is an integer number (4176900).

Almost surely, 2^49571820 is an apocalyptic number.

It is an amenable number.

49571820 is an abundant number, since it is smaller than the sum of its proper divisors (100796580).

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

49571820 is a wasteful number, since it uses less digits than its factorization.

49571820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275414 (or 275409 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 49571820 is about 7040.7258148574. The cubic root of 49571820 is about 367.3485145473.

The spelling of 49571820 in words is "forty-nine million, five hundred seventy-one thousand, eight hundred twenty".