52781438 has 8 divisors (see below), whose sum is σ = 79278480. Its totient is φ = 26355280.

The previous prime is 52781419. The next prime is 52781543. The reversal of 52781438 is 83418725.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15818 + ... + 18861.

It is an arithmetic number, because the mean of its divisors is an integer number (9909810).

Almost surely, 2^52781438 is an apocalyptic number.

52781438 is a deficient number, since it is larger than the sum of its proper divisors (26497042).

52781438 is a wasteful number, since it uses less digits than its factorization.

52781438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35442.

The product of its digits is 53760, while the sum is 38.

The square root of 52781438 is about 7265.0834819705. The cubic root of 52781438 is about 375.1115235708. Note that the first 3 decimals are identical.

The spelling of 52781438 in words is "fifty-two million, seven hundred eighty-one thousand, four hundred thirty-eight".