53697280 has 144 divisors (see below), whose sum is σ = 158647104. Its totient is φ = 16957440.

The previous prime is 53697277. The next prime is 53697283. The reversal of 53697280 is 8279635.

It is an interprime number because it is at equal distance from previous prime (53697277) and next prime (53697283).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (53697283) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 116250 + ... + 116710.

It is an arithmetic number, because the mean of its divisors is an integer number (1101716).

Almost surely, 2^53697280 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 53697280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79323552).

53697280 is an abundant number, since it is smaller than the sum of its proper divisors (104949824).

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

53697280 is a wasteful number, since it uses less digits than its factorization.

53697280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 53697280 is about 7327.8427930736. The cubic root of 53697280 is about 377.2686886084.

The spelling of 53697280 in words is "fifty-three million, six hundred ninety-seven thousand, two hundred eighty".