400715 has 12 divisors (see below), whose sum is σ = 554736. Its totient is φ = 272208.

The previous prime is 400711. The next prime is 400721. The reversal of 400715 is 517004.

It is a happy number.

It is not a de Polignac number, because 400715 - 2² = 400711 is a prime.

It is a super-4 number, since 4×400715⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 400693 and 400702.

It is not an unprimeable number, because it can be changed into a prime (400711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3692 + ... + 3798.

It is an arithmetic number, because the mean of its divisors is an integer number (46228).

2⁴⁰⁰⁷¹⁵ is an apocalyptic number.

400715 is a deficient number, since it is larger than the sum of its proper divisors (154021).

400715 is an equidigital number, since it uses as much as digits as its factorization.

400715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 400715 is about 633.0205367917. The cubic root of 400715 is about 73.7245052162.

Multiplying 400715 by its product of nonzero digits (140), we get a square (56100100 = 7490²).

Adding to 400715 its reverse (517004), we get a palindrome (917719).

The spelling of 400715 in words is "four hundred thousand, seven hundred fifteen".