51419440 has 40 divisors (see below), whose sum is σ = 119925360. Its totient is φ = 20503296.

The previous prime is 51419437. The next prime is 51419461. The reversal of 51419440 is 4491415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 51419399 and 51419408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30951 + ... + 32569.

It is an arithmetic number, because the mean of its divisors is an integer number (2998134).

Almost surely, 2^51419440 is an apocalyptic number.

It is an amenable number.

51419440 is an abundant number, since it is smaller than the sum of its proper divisors (68505920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51419440 is a wasteful number, since it uses less digits than its factorization.

51419440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51419440 is about 7170.7349693041. The cubic root of 51419440 is about 371.8568455229.

The spelling of 51419440 in words is "fifty-one million, four hundred nineteen thousand, four hundred forty".