52578742 has 4 divisors (see below), whose sum is σ = 78868116. Its totient is φ = 26289370.

The previous prime is 52578737. The next prime is 52578791. The reversal of 52578742 is 24787525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×52578742² = 5529048220605128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 52578695 and 52578704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13144684 + ... + 13144687.

It is an arithmetic number, because the mean of its divisors is an integer number (19717029).

Almost surely, 2^52578742 is an apocalyptic number.

52578742 is a deficient number, since it is larger than the sum of its proper divisors (26289374).

52578742 is a wasteful number, since it uses less digits than its factorization.

52578742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26289373.

The product of its digits is 156800, while the sum is 40.

The square root of 52578742 is about 7251.1200514127. The cubic root of 52578742 is about 374.6307286373.

The spelling of 52578742 in words is "fifty-two million, five hundred seventy-eight thousand, seven hundred forty-two".