51790990 has 8 divisors (see below), whose sum is σ = 93223800. Its totient is φ = 20716392.

The previous prime is 51790957. The next prime is 51791029. The reversal of 51790990 is 9909715.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2589540 + ... + 2589559.

It is an arithmetic number, because the mean of its divisors is an integer number (11652975).

Almost surely, 2^51790990 is an apocalyptic number.

51790990 is a deficient number, since it is larger than the sum of its proper divisors (41432810).

51790990 is a wasteful number, since it uses less digits than its factorization.

51790990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179106.

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 51790990 is about 7196.5957229790. The cubic root of 51790990 is about 372.7503594482.

The spelling of 51790990 in words is "fifty-one million, seven hundred ninety thousand, nine hundred ninety".