52006404 has 48 divisors (see below), whose sum is σ = 128741760. Its totient is φ = 16304640.

The previous prime is 52006397. The next prime is 52006429. The reversal of 52006404 is 40460025.

It is a happy number.

It is a super-2 number, since 2×52006404² = 5409332114022432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15292 + ... + 18380.

It is an arithmetic number, because the mean of its divisors is an integer number (2682120).

Almost surely, 2^52006404 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 52006404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64370880).

52006404 is an abundant number, since it is smaller than the sum of its proper divisors (76735356).

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

52006404 is a wasteful number, since it uses less digits than its factorization.

52006404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180 (or 3178 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 52006404 is about 7211.5465747647. The cubic root of 52006404 is about 373.2664374896.

Adding to 52006404 its reverse (40460025), we get a palindrome (92466429).

The spelling of 52006404 in words is "fifty-two million, six thousand, four hundred four".