49669290 has 72 divisors (see below), whose sum is σ = 141978564. Its totient is φ = 12038400.

The previous prime is 49669289. The next prime is 49669297. The reversal of 49669290 is 9296694.

It can be written as a sum of positive squares in 2 ways, for example, as 48483369 + 1185921 = 6963^2 + 1089^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (49669297) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8610 + ... + 13170.

Almost surely, 2^49669290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49669290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70989282).

49669290 is an abundant number, since it is smaller than the sum of its proper divisors (92309274).

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

49669290 is a wasteful number, since it uses less digits than its factorization.

49669290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596 (or 4582 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 49669290 is about 7047.6442872778. The cubic root of 49669290 is about 367.5891217979.

The spelling of 49669290 in words is "forty-nine million, six hundred sixty-nine thousand, two hundred ninety".