290400138890 has 8 divisors (see below), whose sum is σ = 522720250020. Its totient is φ = 116160055552.

The previous prime is 290400138881. The next prime is 290400138953. The reversal of 290400138890 is 98831004092.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 277310719609 + 13089419281 = 526603^2 + 114409^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14520006935 + ... + 14520006954.

Almost surely, 2^290400138890 is an apocalyptic number.

290400138890 is a deficient number, since it is larger than the sum of its proper divisors (232320111130).

290400138890 is a wasteful number, since it uses less digits than its factorization.

290400138890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29040013896.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 290400138890 in words is "two hundred ninety billion, four hundred million, one hundred thirty-eight thousand, eight hundred ninety".