52438644 has 24 divisors (see below), whose sum is σ = 135952320. Its totient is φ = 17479512.

The previous prime is 52438637. The next prime is 52438649. The reversal of 52438644 is 44683425.

52438644 is a `hidden beast` number, since 5 + 2 + 4 + 3 + 8 + 644 = 666.

It is a super-2 number, since 2×52438644² = 5499622769117472, which contains 22 as substring.

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 = 52438599 and 52438608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52438649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242664 + ... + 242879.

It is an arithmetic number, because the mean of its divisors is an integer number (5664680).

Almost surely, 2^52438644 is an apocalyptic number.

52438644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52438644 is an abundant number, since it is smaller than the sum of its proper divisors (83513676).

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

52438644 is a wasteful number, since it uses less digits than its factorization.

52438644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485556 (or 485548 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 52438644 is about 7241.4531690815. The cubic root of 52438644 is about 374.2976935294.

The spelling of 52438644 in words is "fifty-two million, four hundred thirty-eight thousand, six hundred forty-four".