400730 has 16 divisors (see below), whose sum is σ = 787104. Its totient is φ = 145680.

The previous prime is 400723. The next prime is 400739. The reversal of 400730 is 37004.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (49194).

2⁴⁰⁰⁷³⁰ is an apocalyptic number.

400730 is a deficient number, since it is larger than the sum of its proper divisors (386374).

400730 is a wasteful number, since it uses less digits than its factorization.

400730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 400730 is about 633.0323846376. The cubic root of 400730 is about 73.7254251167.

Adding to 400730 its reverse (37004), we get a palindrome (437734).

The spelling of 400730 in words is "four hundred thousand, seven hundred thirty".