7898531512 has 8 divisors (see below), whose sum is σ = 14809746600. Its totient is φ = 3949265752.

The previous prime is 7898531507. The next prime is 7898531519. The reversal of 7898531512 is 2151358987.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7898531512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7898531519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493658212 + ... + 493658227.

It is an arithmetic number, because the mean of its divisors is an integer number (1851218325).

Almost surely, 2^7898531512 is an apocalyptic number.

It is an amenable number.

7898531512 is a deficient number, since it is larger than the sum of its proper divisors (6911215088).

7898531512 is a wasteful number, since it uses less digits than its factorization.

7898531512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987316445 (or 987316441 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The square root of 7898531512 is about 88873.6828988199. The cubic root of 7898531512 is about 1991.5082891173.

The spelling of 7898531512 in words is "seven billion, eight hundred ninety-eight million, five hundred thirty-one thousand, five hundred twelve".