402871224 has 64 divisors (see below), whose sum is σ = 1162506240. Its totient is φ = 113961600.

The previous prime is 402871223. The next prime is 402871229. The reversal of 402871224 is 422178204.

It is a junction number, because it is equal to n+sod(n) for n = 402871191 and 402871200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402871223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097 + ... + 28839.

It is an arithmetic number, because the mean of its divisors is an integer number (18164160).

Almost surely, 2^402871224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402871224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581253120).

402871224 is an abundant number, since it is smaller than the sum of its proper divisors (759635016).

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

402871224 is a wasteful number, since it uses less digits than its factorization.

402871224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23860 (or 23856 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 402871224 is about 20071.6522488808. The cubic root of 402871224 is about 738.5650448997.

The spelling of 402871224 in words is "four hundred two million, eight hundred seventy-one thousand, two hundred twenty-four".