297150640 has 40 divisors (see below), whose sum is σ = 706950288. Its totient is φ = 116094720.

The previous prime is 297150613. The next prime is 297150643. The reversal of 297150640 is 46051792.

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

It is a junction number, because it is equal to n+sod(n) for n = 297150596 and 297150605.

It is not an unprimeable number, because it can be changed into a prime (297150643) 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, 39751 + ... + 46630.

Almost surely, 2^297150640 is an apocalyptic number.

297150640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

297150640 is an abundant number, since it is smaller than the sum of its proper divisors (409799648).

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

297150640 is a wasteful number, since it uses less digits than its factorization.

297150640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86437 (or 86431 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 297150640 is about 17238.0578952503. The cubic root of 297150640 is about 667.3068095733.

The spelling of 297150640 in words is "two hundred ninety-seven million, one hundred fifty thousand, six hundred forty".