230490154640 has 40 divisors (see below), whose sum is σ = 536071631928. Its totient is φ = 92164746240.

The previous prime is 230490154597. The next prime is 230490154673. The reversal of 230490154640 is 46451094032.

It can be written as a sum of positive squares in 4 ways, for example, as 61710509056 + 168779645584 = 248416^2 + 410828^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×230490154640² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230490154594 and 230490154603.

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, 251591 + ... + 724070.

Almost surely, 2^230490154640 is an apocalyptic number.

230490154640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230490154640 is an abundant number, since it is smaller than the sum of its proper divisors (305581477288).

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

230490154640 is a wasteful number, since it uses less digits than its factorization.

230490154640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978627 (or 978621 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 230490154640 in words is "two hundred thirty billion, four hundred ninety million, one hundred fifty-four thousand, six hundred forty".