402744 has 32 divisors (see below), whose sum is σ = 1023120. Its totient is φ = 132096.

The previous prime is 402739. The next prime is 402751. The reversal of 402744 is 447204.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 402744.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402744.

It is an unprimeable number.

402744 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 7 ways as a sum of consecutive naturals, for example, 2242 + ... + 2414.

2⁴⁰²⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

402744 is an abundant number, since it is smaller than the sum of its proper divisors (620376).

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

402744 is a wasteful number, since it uses less digits than its factorization.

402744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 402744 is about 634.6211468270. The cubic root of 402744 is about 73.8487292104.

Adding to 402744 its reverse (447204), we get a palindrome (849948).

The spelling of 402744 in words is "four hundred two thousand, seven hundred forty-four", and thus it is an iban number.