2397640 has 32 divisors (see below), whose sum is σ = 6166080. Its totient is φ = 821952.

The previous prime is 2397631. The next prime is 2397641. The reversal of 2397640 is 467932.

It is not an unprimeable number, because it can be changed into a prime (2397641) 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, 4002 + ... + 4561.

It is an arithmetic number, because the mean of its divisors is an integer number (192690).

2^2397640 is an apocalyptic number.

2397640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2397640 is an abundant number, since it is smaller than the sum of its proper divisors (3768440).

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

2397640 is a wasteful number, since it uses less digits than its factorization.

2397640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8581 (or 8577 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2397640 is about 1548.4314644181. The cubic root of 2397640 is about 133.8426905751.

The spelling of 2397640 in words is "two million, three hundred ninety-seven thousand, six hundred forty".