100605402 has 48 divisors (see below), whose sum is σ = 227852352. Its totient is φ = 33268320.

The previous prime is 100605397. The next prime is 100605467. The reversal of 100605402 is 204506001.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65827 + ... + 67337.

It is an arithmetic number, because the mean of its divisors is an integer number (4746924).

Almost surely, 2^100605402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100605402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113926176).

100605402 is an abundant number, since it is smaller than the sum of its proper divisors (127246950).

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

100605402 is a wasteful number, since it uses less digits than its factorization.

100605402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 100605402 is about 10030.2244242091. The cubic root of 100605402 is about 465.0936751964.

The spelling of 100605402 in words is "one hundred million, six hundred five thousand, four hundred two".