402101010 has 80 divisors (see below), whose sum is σ = 1084539456. Its totient is φ = 106896672.

The previous prime is 402101003. The next prime is 402101033. The reversal of 402101010 is 10101204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 402100983 and 402101001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 377739 + ... + 378801.

Almost surely, 2^402101010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402101010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542269728).

402101010 is an abundant number, since it is smaller than the sum of its proper divisors (682438446).

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

402101010 is a wasteful number, since it uses less digits than its factorization.

402101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 402101010 is about 20052.4564580004. The cubic root of 402101010 is about 738.0940788255.

Adding to 402101010 its reverse (10101204), we get a palindrome (412202214).

The spelling of 402101010 in words is "four hundred two million, one hundred one thousand, ten".