400752427 has 4 divisors (see below), whose sum is σ = 421844680. Its totient is φ = 379660176.

The previous prime is 400752413. The next prime is 400752431. The reversal of 400752427 is 724257004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400752427 - 2¹⁹ = 400228139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400752487) 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, 10546098 + ... + 10546135.

It is an arithmetic number, because the mean of its divisors is an integer number (105461170).

Almost surely, 2^400752427 is an apocalyptic number.

400752427 is a deficient number, since it is larger than the sum of its proper divisors (21092253).

400752427 is a wasteful number, since it uses less digits than its factorization.

400752427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21092252.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 400752427 is about 20018.8018372729. The cubic root of 400752427 is about 737.2680044778.

The spelling of 400752427 in words is "four hundred million, seven hundred fifty-two thousand, four hundred twenty-seven".