7906398 has 16 divisors (see below), whose sum is σ = 15895440. Its totient is φ = 2621696.

The previous prime is 7906397. The next prime is 7906403. The reversal of 7906398 is 8936097.

It is a happy number.

It is a super-2 number, since 2×7906398² = 125022258668808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7906391) 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, 2163 + ... + 4526.

It is an arithmetic number, because the mean of its divisors is an integer number (993465).

Almost surely, 2^7906398 is an apocalyptic number.

7906398 is an abundant number, since it is smaller than the sum of its proper divisors (7989042).

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

7906398 is a wasteful number, since it uses less digits than its factorization.

7906398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 7906398 is about 2811.8317872874. The cubic root of 7906398 is about 199.2169212735.

The spelling of 7906398 in words is "seven million, nine hundred six thousand, three hundred ninety-eight".