99942406 has 16 divisors (see below), whose sum is σ = 160072704. Its totient is φ = 46686024.

The previous prime is 99942397. The next prime is 99942407. The reversal of 99942406 is 60424999.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99942407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23286 + ... + 27241.

It is an arithmetic number, because the mean of its divisors is an integer number (10004544).

Almost surely, 2^99942406 is an apocalyptic number.

99942406 is a deficient number, since it is larger than the sum of its proper divisors (60130298).

99942406 is a wasteful number, since it uses less digits than its factorization.

99942406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50595.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 99942406 is about 9997.1198852470. The cubic root of 99942406 is about 464.0697570262.

The spelling of 99942406 in words is "ninety-nine million, nine hundred forty-two thousand, four hundred six".