99417640 has 32 divisors (see below), whose sum is σ = 255646080. Its totient is φ = 34085952.

The previous prime is 99417613. The next prime is 99417653. The reversal of 99417640 is 4671499.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 99417593 and 99417602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177252 + ... + 177811.

It is an arithmetic number, because the mean of its divisors is an integer number (7988940).

Almost surely, 2^99417640 is an apocalyptic number.

It is an amenable number.

99417640 is an abundant number, since it is smaller than the sum of its proper divisors (156228440).

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

99417640 is a wasteful number, since it uses less digits than its factorization.

99417640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355081 (or 355077 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 99417640 is about 9970.8394832130. The cubic root of 99417640 is about 463.2561033858.

The spelling of 99417640 in words is "ninety-nine million, four hundred seventeen thousand, six hundred forty".