7897490 has 8 divisors (see below), whose sum is σ = 14215500. Its totient is φ = 3158992.

The previous prime is 7897481. The next prime is 7897499. The reversal of 7897490 is 947987.

It is an interprime number because it is at equal distance from previous prime (7897481) and next prime (7897499).

It can be written as a sum of positive squares in 2 ways, for example, as 7711729 + 185761 = 2777^2 + 431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7897499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394865 + ... + 394884.

Almost surely, 2^7897490 is an apocalyptic number.

7897490 is a deficient number, since it is larger than the sum of its proper divisors (6318010).

7897490 is a wasteful number, since it uses less digits than its factorization.

7897490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789756.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 7897490 is about 2810.2473200770. The cubic root of 7897490 is about 199.1420750864.

The spelling of 7897490 in words is "seven million, eight hundred ninety-seven thousand, four hundred ninety".