400023525 has 48 divisors (see below), whose sum is σ = 723757248. Its totient is φ = 193344000.

The previous prime is 400023517. The next prime is 400023527. The reversal of 400023525 is 525320004.

It is not a de Polignac number, because 400023525 - 2³ = 400023517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400023527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376495 + ... + 377555.

It is an arithmetic number, because the mean of its divisors is an integer number (15078276).

Almost surely, 2^400023525 is an apocalyptic number.

It is an amenable number.

400023525 is a deficient number, since it is larger than the sum of its proper divisors (323733723).

400023525 is a wasteful number, since it uses less digits than its factorization.

400023525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 400023525 is about 20000.5881163530. The cubic root of 400023525 is about 736.8207439184.

Adding to 400023525 its reverse (525320004), we get a palindrome (925343529).

The spelling of 400023525 in words is "four hundred million, twenty-three thousand, five hundred twenty-five".