51398444 has 12 divisors (see below), whose sum is σ = 90552000. Its totient is φ = 25526448.

The previous prime is 51398441. The next prime is 51398453. The reversal of 51398444 is 44489315.

It is a super-2 number, since 2×51398444² = 5283600091242272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51398398 and 51398407.

It is not an unprimeable number, because it can be changed into a prime (51398441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42524 + ... + 43715.

It is an arithmetic number, because the mean of its divisors is an integer number (7546000).

Almost surely, 2^51398444 is an apocalyptic number.

It is an amenable number.

51398444 is a deficient number, since it is larger than the sum of its proper divisors (39153556).

51398444 is a wasteful number, since it uses less digits than its factorization.

51398444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86392 (or 86390 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 51398444 is about 7169.2708136881. The cubic root of 51398444 is about 371.8062254381.

The spelling of 51398444 in words is "fifty-one million, three hundred ninety-eight thousand, four hundred forty-four".