100405430 has 32 divisors (see below), whose sum is σ = 186810624. Its totient is φ = 38830176.

The previous prime is 100405429. The next prime is 100405447. The reversal of 100405430 is 34504001.

It is a junction number, because it is equal to n+sod(n) for n = 100405399 and 100405408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43157 + ... + 45423.

It is an arithmetic number, because the mean of its divisors is an integer number (5837832).

Almost surely, 2^100405430 is an apocalyptic number.

100405430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100405430 is a deficient number, since it is larger than the sum of its proper divisors (86405194).

100405430 is a wasteful number, since it uses less digits than its factorization.

100405430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 100405430 is about 10020.2509948604. The cubic root of 100405430 is about 464.7853173257.

Adding to 100405430 its reverse (34504001), we get a palindrome (134909431).

The spelling of 100405430 in words is "one hundred million, four hundred five thousand, four hundred thirty".