53277840 has 360 divisors, whose sum is σ = 230503104. Its totient is φ = 10713600.

The previous prime is 53277839. The next prime is 53277841. The reversal of 53277840 is 4877235.

It is an interprime number because it is at equal distance from previous prime (53277839) and next prime (53277841).

It is a tau number, because it is divible by the number of its divisors (360).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53277795 and 53277804.

It is not an unprimeable number, because it can be changed into a prime (53277841) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1718625 + ... + 1718655.

Almost surely, 2^53277840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53277840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115251552).

53277840 is an abundant number, since it is smaller than the sum of its proper divisors (177225264).

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

53277840 is a wasteful number, since it uses less digits than its factorization.

53277840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 53277840 is about 7299.1670757697. The cubic root of 53277840 is about 376.2838131810.

The spelling of 53277840 in words is "fifty-three million, two hundred seventy-seven thousand, eight hundred forty".