402405102 has 144 divisors (see below), whose sum is σ = 1038229920. Its totient is φ = 112210560.

The previous prime is 402405049. The next prime is 402405121. The reversal of 402405102 is 201504204.

It is a super-2 number, since 2×402405102² = 323859732231260808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1452588 + ... + 1452864.

It is an arithmetic number, because the mean of its divisors is an integer number (7209930).

Almost surely, 2^402405102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402405102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519114960).

402405102 is an abundant number, since it is smaller than the sum of its proper divisors (635824818).

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

402405102 is a wasteful number, since it uses less digits than its factorization.

402405102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 402405102 is about 20060.0374376520. The cubic root of 402405102 is about 738.2800950606.

Adding to 402405102 its reverse (201504204), we get a palindrome (603909306).

It can be divided in two parts, 402 and 405102, that added together give a palindrome (405504).

The spelling of 402405102 in words is "four hundred two million, four hundred five thousand, one hundred two".