100402320 has 40 divisors (see below), whose sum is σ = 311247936. Its totient is φ = 26773888.

The previous prime is 100402319. The next prime is 100402339. The reversal of 100402320 is 23204001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×100402320² = 20161251722764800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100402296 and 100402305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208932 + ... + 209411.

Almost surely, 2^100402320 is an apocalyptic number.

100402320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100402320 is an abundant number, since it is smaller than the sum of its proper divisors (210845616).

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

100402320 is a wasteful number, since it uses less digits than its factorization.

100402320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418359 (or 418353 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 100402320 is about 10020.0958079252. The cubic root of 100402320 is about 464.7805184575.

Adding to 100402320 its reverse (23204001), we get a palindrome (123606321).

The spelling of 100402320 in words is "one hundred million, four hundred two thousand, three hundred twenty".