400064501 has 4 divisors (see below), whose sum is σ = 400108032. Its totient is φ = 400020972.

The previous prime is 400064479. The next prime is 400064503. The reversal of 400064501 is 105460004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400064501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400064503) 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, 1991 + ... + 28356.

It is an arithmetic number, because the mean of its divisors is an integer number (100027008).

Almost surely, 2^400064501 is an apocalyptic number.

It is an amenable number.

400064501 is a deficient number, since it is larger than the sum of its proper divisors (43531).

400064501 is a wasteful number, since it uses less digits than its factorization.

400064501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43530.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400064501 is about 20001.6124599993. The cubic root of 400064501 is about 736.8459015521.

The spelling of 400064501 in words is "four hundred million, sixty-four thousand, five hundred one".