53720280 has 64 divisors (see below), whose sum is σ = 179071200. Its totient is φ = 14325120.

The previous prime is 53720279. The next prime is 53720281. The reversal of 53720280 is 8202735.

It is an interprime number because it is at equal distance from previous prime (53720279) and next prime (53720281).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53720281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23791 + ... + 25950.

Almost surely, 2^53720280 is an apocalyptic number.

It is an amenable number.

53720280 is an abundant number, since it is smaller than the sum of its proper divisors (125350920).

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

53720280 is a wasteful number, since it uses less digits than its factorization.

53720280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49761 (or 49751 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 53720280 is about 7329.4119818714. The cubic root of 53720280 is about 377.3225457202.

The spelling of 53720280 in words is "fifty-three million, seven hundred twenty thousand, two hundred eighty".