400726 has 4 divisors (see below), whose sum is σ = 601092. Its totient is φ = 200362.

The previous prime is 400723. The next prime is 400739. The reversal of 400726 is 627004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100180 + ... + 100183.

It is an arithmetic number, because the mean of its divisors is an integer number (150273).

2⁴⁰⁰⁷²⁶ is an apocalyptic number.

400726 is a deficient number, since it is larger than the sum of its proper divisors (200366).

400726 is a wasteful number, since it uses less digits than its factorization.

400726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200365.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 400726 is about 633.0292252337. The cubic root of 400726 is about 73.7251798121.

The spelling of 400726 in words is "four hundred thousand, seven hundred twenty-six".