90402050 has 12 divisors (see below), whose sum is σ = 168147906. Its totient is φ = 36160800.

The previous prime is 90402049. The next prime is 90402083. The reversal of 90402050 is 5020409.

90402050 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 3 ways, for example, as 73942801 + 16459249 = 8599^2 + 4057^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 903971 + ... + 904070.

Almost surely, 2^90402050 is an apocalyptic number.

90402050 is a deficient number, since it is larger than the sum of its proper divisors (77745856).

90402050 is a wasteful number, since it uses less digits than its factorization.

90402050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808053 (or 1808048 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 90402050 is about 9507.9992637778. Note that the first 3 decimals coincide. The cubic root of 90402050 is about 448.8067977963.

Adding to 90402050 its reverse (5020409), we get a palindrome (95422459).

The spelling of 90402050 in words is "ninety million, four hundred two thousand, fifty".