52189740 has 144 divisors (see below), whose sum is σ = 167731200. Its totient is φ = 13115520.

The previous prime is 52189727. The next prime is 52189759. The reversal of 52189740 is 4798125.

52189740 is a `hidden beast` number, since 521 + 8 + 97 + 40 = 666.

It is a super-2 number, since 2×52189740² = 5447537922535200, 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 = 52189695 and 52189704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262161 + ... + 262359.

It is an arithmetic number, because the mean of its divisors is an integer number (1164800).

Almost surely, 2^52189740 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 52189740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83865600).

52189740 is an abundant number, since it is smaller than the sum of its proper divisors (115541460).

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

52189740 is a wasteful number, since it uses less digits than its factorization.

52189740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 52189740 is about 7224.2466735294. The cubic root of 52189740 is about 373.7045432649.

The spelling of 52189740 in words is "fifty-two million, one hundred eighty-nine thousand, seven hundred forty".