402001530 has 64 divisors (see below), whose sum is σ = 1105429248. Its totient is φ = 91653120.

The previous prime is 402001517. The next prime is 402001573. The reversal of 402001530 is 35100204.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88720 + ... + 93140.

It is an arithmetic number, because the mean of its divisors is an integer number (17272332).

Almost surely, 2^402001530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402001530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552714624).

402001530 is an abundant number, since it is smaller than the sum of its proper divisors (703427718).

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

402001530 is a wasteful number, since it uses less digits than its factorization.

402001530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 402001530 is about 20049.9758104592. The cubic root of 402001530 is about 738.0332055182.

Adding to 402001530 its reverse (35100204), we get a palindrome (437101734).

The spelling of 402001530 in words is "four hundred two million, one thousand, five hundred thirty".