99685740 has 96 divisors (see below), whose sum is σ = 348009984. Its totient is φ = 20712960.

The previous prime is 99685727. The next prime is 99685757. The reversal of 99685740 is 4758699.

It is a self number, because there is not a number n which added to its sum of digits gives 99685740.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6169 + ... + 15408.

It is an arithmetic number, because the mean of its divisors is an integer number (3625104).

Almost surely, 2^99685740 is an apocalyptic number.

It is an amenable number.

99685740 is an abundant number, since it is smaller than the sum of its proper divisors (248324244).

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

99685740 is a wasteful number, since it uses less digits than its factorization.

99685740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21607 (or 21605 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 99685740 is about 9984.2746356458. The cubic root of 99685740 is about 463.6721512342.

It can be divided in two parts, 996 and 85740, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 99685740 in words is "ninety-nine million, six hundred eighty-five thousand, seven hundred forty".