53347640 has 16 divisors (see below), whose sum is σ = 120032280. Its totient is φ = 21339040.

The previous prime is 53347631. The next prime is 53347681. The reversal of 53347640 is 4674335.

It is a super-3 number, since 3×53347640³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53347597 and 53347606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666806 + ... + 666885.

Almost surely, 2^53347640 is an apocalyptic number.

It is an amenable number.

53347640 is an abundant number, since it is smaller than the sum of its proper divisors (66684640).

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

53347640 is a wasteful number, since it uses less digits than its factorization.

53347640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333702 (or 1333698 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 53347640 is about 7303.9468782296. The cubic root of 53347640 is about 376.4480662653.

The spelling of 53347640 in words is "fifty-three million, three hundred forty-seven thousand, six hundred forty".