402567438 has 128 divisors (see below), whose sum is σ = 1038643200. Its totient is φ = 103299840.

The previous prime is 402567433. The next prime is 402567467. The reversal of 402567438 is 834765204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 402567396 and 402567405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402567433) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1096731 + ... + 1097097.

It is an arithmetic number, because the mean of its divisors is an integer number (8114400).

Almost surely, 2^402567438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402567438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519321600).

402567438 is an abundant number, since it is smaller than the sum of its proper divisors (636075762).

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

402567438 is a wasteful number, since it uses less digits than its factorization.

402567438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 402567438 is about 20064.0832833200. The cubic root of 402567438 is about 738.3793593130.

The spelling of 402567438 in words is "four hundred two million, five hundred sixty-seven thousand, four hundred thirty-eight".