49172985 has 12 divisors (see below), whose sum is σ = 85233252. Its totient is φ = 26225568.

The previous prime is 49172947. The next prime is 49172989. The reversal of 49172985 is 58927194.

49172985 is a `hidden beast` number, since 491 + 72 + 98 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28132416 + 21040569 = 5304^2 + 4587^2 .

It is not a de Polignac number, because 49172985 - 2¹¹ = 49170937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1092733 = 49172985 / (4 + 9 + 1 + 7 + 2 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 49172985.

It is not an unprimeable number, because it can be changed into a prime (49172989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546322 + ... + 546411.

It is an arithmetic number, because the mean of its divisors is an integer number (7102771).

Almost surely, 2^49172985 is an apocalyptic number.

49172985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49172985 is a deficient number, since it is larger than the sum of its proper divisors (36060267).

49172985 is a wasteful number, since it uses less digits than its factorization.

49172985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092744 (or 1092741 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 49172985 is about 7012.3451854569. The cubic root of 49172985 is about 366.3606809039.

The spelling of 49172985 in words is "forty-nine million, one hundred seventy-two thousand, nine hundred eighty-five".