400700 has 18 divisors (see below), whose sum is σ = 869736. Its totient is φ = 160240.

The previous prime is 400681. The next prime is 400703. The reversal of 400700 is 7004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400703) by changing a digit.

400700 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1904 + ... + 2103.

2⁴⁰⁰⁷⁰⁰ is an apocalyptic number.

It is an amenable number.

400700 is an abundant number, since it is smaller than the sum of its proper divisors (469036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400700 is a wasteful number, since it uses less digits than its factorization.

400700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 400700 is about 633.0086887239. The cubic root of 400700 is about 73.7235852928.

Subtracting from 400700 its sum of digits (11), we obtain a square (400689 = 633²).

Adding to 400700 its reverse (7004), we get a palindrome (407704).

The spelling of 400700 in words is "four hundred thousand, seven hundred", and thus it is an iban number.