400374 has 48 divisors (see below), whose sum is σ = 982800. Its totient is φ = 116928.

The previous prime is 400339. The next prime is 400381. The reversal of 400374 is 473004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

400374 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 23 ways as a sum of consecutive naturals, for example, 6757 + ... + 6815.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2⁴⁰⁰³⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491400).

400374 is an abundant number, since it is smaller than the sum of its proper divisors (582426).

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

400374 is a wasteful number, since it uses less digits than its factorization.

400374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 400374 is about 632.7511359136. The cubic root of 400374 is about 73.7035866158.

Adding to 400374 its reverse (473004), we get a palindrome (873378).

The spelling of 400374 in words is "four hundred thousand, three hundred seventy-four", and thus it is an iban number.