100400355 has 36 divisors (see below), whose sum is σ = 191296560. Its totient is φ = 48676320.

The previous prime is 100400329. The next prime is 100400357. The reversal of 100400355 is 553004001.

It is not a de Polignac number, because 100400355 - 2⁵ = 100400323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100400357) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3775 + ... + 14664.

Almost surely, 2^100400355 is an apocalyptic number.

100400355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100400355 is a deficient number, since it is larger than the sum of its proper divisors (90896205).

100400355 is a wasteful number, since it uses less digits than its factorization.

100400355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18472 (or 18458 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 100400355 is about 10019.9977544908. The cubic root of 100400355 is about 464.7774863241. Note that the first 3 decimals are identical.

Adding to 100400355 its reverse (553004001), we get a palindrome (653404356).

The spelling of 100400355 in words is "one hundred million, four hundred thousand, three hundred fifty-five".