400213807 has 4 divisors (see below), whose sum is σ = 457387216. Its totient is φ = 343040400.

The previous prime is 400213787. The next prime is 400213811. The reversal of 400213807 is 708312004.

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 400213807 - 2⁷ = 400213679 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 (400213817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28586694 + ... + 28586707.

It is an arithmetic number, because the mean of its divisors is an integer number (114346804).

Almost surely, 2^400213807 is an apocalyptic number.

400213807 is a deficient number, since it is larger than the sum of its proper divisors (57173409).

400213807 is an equidigital number, since it uses as much as digits as its factorization.

400213807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57173408.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400213807 is about 20005.3444609184. The cubic root of 400213807 is about 736.9375549652.

The spelling of 400213807 in words is "four hundred million, two hundred thirteen thousand, eight hundred seven".