99405400 has 48 divisors (see below), whose sum is σ = 231782040. Its totient is φ = 39648000.

The previous prime is 99405389. The next prime is 99405407. The reversal of 99405400 is 450499.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99405407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119787 + ... + 120613.

Almost surely, 2^99405400 is an apocalyptic number.

It is an amenable number.

99405400 is an abundant number, since it is smaller than the sum of its proper divisors (132376640).

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

99405400 is a wasteful number, since it uses less digits than its factorization.

99405400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 99405400 is about 9970.2256744770. The cubic root of 99405400 is about 463.2370910408.

Adding to 99405400 its reverse (450499), we get a palindrome (99855899).

The spelling of 99405400 in words is "ninety-nine million, four hundred five thousand, four hundred".