49187690 has 8 divisors (see below), whose sum is σ = 88537860. Its totient is φ = 19675072.

The previous prime is 49187641. The next prime is 49187693. The reversal of 49187690 is 9678194.

It can be written as a sum of positive squares in 2 ways, for example, as 45657049 + 3530641 = 6757^2 + 1879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×49187690² = 4838857695072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49187693) 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, 2459375 + ... + 2459394.

Almost surely, 2^49187690 is an apocalyptic number.

49187690 is a deficient number, since it is larger than the sum of its proper divisors (39350170).

49187690 is a wasteful number, since it uses less digits than its factorization.

49187690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4918776.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 49187690 is about 7013.3936150768. The cubic root of 49187690 is about 366.3971968681.

The spelling of 49187690 in words is "forty-nine million, one hundred eighty-seven thousand, six hundred ninety".