9902144740 has 12 divisors (see below), whose sum is σ = 20794503996. Its totient is φ = 3960857888.

The previous prime is 9902144729. The next prime is 9902144761. The reversal of 9902144740 is 474412099.

It can be written as a sum of positive squares in 2 ways, for example, as 1165129956 + 8737014784 = 34134^2 + 93472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9902144693 and 9902144702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247553599 + ... + 247553638.

It is an arithmetic number, because the mean of its divisors is an integer number (1732875333).

Almost surely, 2^9902144740 is an apocalyptic number.

It is an amenable number.

9902144740 is an abundant number, since it is smaller than the sum of its proper divisors (10892359256).

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

9902144740 is a wasteful number, since it uses less digits than its factorization.

9902144740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495107246 (or 495107244 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 9902144740 is about 99509.5208510221. The cubic root of 9902144740 is about 2147.3842166879.

The spelling of 9902144740 in words is "nine billion, nine hundred two million, one hundred forty-four thousand, seven hundred forty".