50691090 has 16 divisors (see below), whose sum is σ = 121658688. Its totient is φ = 13517616.

The previous prime is 50691083. The next prime is 50691139. The reversal of 50691090 is 9019605.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1689703 = 50691090 / (5 + 0 + 6 + 9 + 1 + 0 + 9 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844822 + ... + 844881.

It is an arithmetic number, because the mean of its divisors is an integer number (7603668).

Almost surely, 2^50691090 is an apocalyptic number.

50691090 is an abundant number, since it is smaller than the sum of its proper divisors (70967598).

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

50691090 is a wasteful number, since it uses less digits than its factorization.

50691090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689713.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 50691090 is about 7119.7675523854. The cubic root of 50691090 is about 370.0927208579.

The spelling of 50691090 in words is "fifty million, six hundred ninety-one thousand, ninety".