400520534 has 8 divisors (see below), whose sum is σ = 603800400. Its totient is φ = 199253736.

The previous prime is 400520531. The next prime is 400520539. The reversal of 400520534 is 435025004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400520531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502769 + ... + 503564.

It is an arithmetic number, because the mean of its divisors is an integer number (75475050).

Almost surely, 2^400520534 is an apocalyptic number.

400520534 is a deficient number, since it is larger than the sum of its proper divisors (203279866).

400520534 is a wasteful number, since it uses less digits than its factorization.

400520534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006534.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 400520534 is about 20013.0091190705. The cubic root of 400520534 is about 737.1257717968.

Adding to 400520534 its reverse (435025004), we get a palindrome (835545538).

The spelling of 400520534 in words is "four hundred million, five hundred twenty thousand, five hundred thirty-four".