400920529 has 3 divisors (see below), whose sum is σ = 400940553. Its totient is φ = 400900506.

The previous prime is 400920523. The next prime is 400920557. The reversal of 400920529 is 925029004.

The square root of 400920529 is 20023.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 400920529 - 2²⁷ = 266702801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400920529.

It is not an unprimeable number, because it can be changed into a prime (400920523) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10012 + ... + 30034.

It is an arithmetic number, because the mean of its divisors is an integer number (133646851).

Almost surely, 2^400920529 is an apocalyptic number.

400920529 is the 20023-rd square number.

400920529 is the 10012-nd centered octagonal number.

It is an amenable number.

400920529 is a deficient number, since it is larger than the sum of its proper divisors (20024).

400920529 is an frugal number, since it uses more digits than its factorization.

400920529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40046 (or 20023 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The cubic root of 400920529 is about 737.3710763436.

The spelling of 400920529 in words is "four hundred million, nine hundred twenty thousand, five hundred twenty-nine".