53290740 has 24 divisors (see below), whose sum is σ = 149214240. Its totient is φ = 14210848.

The previous prime is 53290723. The next prime is 53290753. The reversal of 53290740 is 4709235.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53290698 and 53290707.

It is a congruent number.

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, 444030 + ... + 444149.

It is an arithmetic number, because the mean of its divisors is an integer number (6217260).

Almost surely, 2^53290740 is an apocalyptic number.

It is an amenable number.

53290740 is an abundant number, since it is smaller than the sum of its proper divisors (95923500).

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

53290740 is a wasteful number, since it uses less digits than its factorization.

53290740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888191 (or 888189 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 53290740 is about 7300.0506847556. The cubic root of 53290740 is about 376.3141802121.

Adding to 53290740 its reverse (4709235), we get a palindrome (57999975).

The spelling of 53290740 in words is "fifty-three million, two hundred ninety thousand, seven hundred forty".