51746890 has 16 divisors (see below), whose sum is σ = 100309608. Its totient is φ = 19106496.

The previous prime is 51746887. The next prime is 51746911. The reversal of 51746890 is 9864715.

It can be written as a sum of positive squares in 4 ways, for example, as 41177889 + 10569001 = 6417^2 + 3251^2 .

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, 198897 + ... + 199156.

Almost surely, 2^51746890 is an apocalyptic number.

51746890 is a deficient number, since it is larger than the sum of its proper divisors (48562718).

51746890 is a wasteful number, since it uses less digits than its factorization.

51746890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398073.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 51746890 is about 7193.5311217788. The cubic root of 51746890 is about 372.6445304949.

The spelling of 51746890 in words is "fifty-one million, seven hundred forty-six thousand, eight hundred ninety".