49189990 has 8 divisors (see below), whose sum is σ = 88542000. Its totient is φ = 19675992.

The previous prime is 49189981. The next prime is 49189997. The reversal of 49189990 is 9998194.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49189997) 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, 2459490 + ... + 2459509.

It is an arithmetic number, because the mean of its divisors is an integer number (11067750).

Almost surely, 2^49189990 is an apocalyptic number.

49189990 is a deficient number, since it is larger than the sum of its proper divisors (39352010).

49189990 is a wasteful number, since it uses less digits than its factorization.

49189990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919006.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 49189990 is about 7013.5575851347. The cubic root of 49189990 is about 366.4029076494.

The spelling of 49189990 in words is "forty-nine million, one hundred eighty-nine thousand, nine hundred ninety".