49171720 has 32 divisors (see below), whose sum is σ = 119148120. Its totient is φ = 18155520.

The previous prime is 49171711. The next prime is 49171739. The reversal of 49171720 is 2717194.

It can be written as a sum of positive squares in 4 ways, for example, as 23951236 + 25220484 = 4894^2 + 5022^2 .

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, 46761 + ... + 47800.

Almost surely, 2^49171720 is an apocalyptic number.

49171720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49171720 is an abundant number, since it is smaller than the sum of its proper divisors (69976400).

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

49171720 is a wasteful number, since it uses less digits than its factorization.

49171720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94585 (or 94581 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 49171720 is about 7012.2549868070. The cubic root of 49171720 is about 366.3575392721.

The spelling of 49171720 in words is "forty-nine million, one hundred seventy-one thousand, seven hundred twenty".