51838340 has 12 divisors (see below), whose sum is σ = 108860556. Its totient is φ = 20735328.

The previous prime is 51838337. The next prime is 51838363. The reversal of 51838340 is 4383815.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15429184 + 36409156 = 3928^2 + 6034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51838297 and 51838306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295939 + ... + 1295978.

It is an arithmetic number, because the mean of its divisors is an integer number (9071713).

Almost surely, 2^51838340 is an apocalyptic number.

It is an amenable number.

51838340 is an abundant number, since it is smaller than the sum of its proper divisors (57022216).

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

51838340 is a wasteful number, since it uses less digits than its factorization.

51838340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591926 (or 2591924 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 51838340 is about 7199.8847212994. The cubic root of 51838340 is about 372.8639207291.

The spelling of 51838340 in words is "fifty-one million, eight hundred thirty-eight thousand, three hundred forty".