1902985894724 has 24 divisors (see below), whose sum is σ = 3338734854168. Its totient is φ = 949064244480.

The previous prime is 1902985894709. The next prime is 1902985894729. The reversal of 1902985894724 is 4274985892091.

It can be written as a sum of positive squares in 4 ways, for example, as 875661749824 + 1027324144900 = 935768^2 + 1013570^2 .

It is a super-2 number, since 2×1902985894724² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1902985894729) 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, 2619902 + ... + 3266474.

It is an arithmetic number, because the mean of its divisors is an integer number (139113952257).

Almost surely, 2^{1902985894724} is an apocalyptic number.

It is an amenable number.

1902985894724 is a deficient number, since it is larger than the sum of its proper divisors (1435748959444).

1902985894724 is a wasteful number, since it uses less digits than its factorization.

1902985894724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648455 (or 648453 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 1902985894724 in words is "one trillion, nine hundred two billion, nine hundred eighty-five million, eight hundred ninety-four thousand, seven hundred twenty-four".