53747640 has 96 divisors (see below), whose sum is σ = 175893120. Its totient is φ = 14233344.

The previous prime is 53747633. The next prime is 53747641. The reversal of 53747640 is 4674735.

53747640 is a `hidden beast` number, since 5 + 3 + 7 + 4 + 7 + 640 = 666.

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 = 53747595 and 53747604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53747641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61849 + ... + 62711.

It is an arithmetic number, because the mean of its divisors is an integer number (1832220).

Almost surely, 2^53747640 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 53747640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87946560).

53747640 is an abundant number, since it is smaller than the sum of its proper divisors (122145480).

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

53747640 is a wasteful number, since it uses less digits than its factorization.

53747640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 53747640 is about 7331.2781968767. The cubic root of 53747640 is about 377.3865922513.

The spelling of 53747640 in words is "fifty-three million, seven hundred forty-seven thousand, six hundred forty".