7698690 has 48 divisors (see below), whose sum is σ = 20220408. Its totient is φ = 2032128.

The previous prime is 7698679. The next prime is 7698703. The reversal of 7698690 is 968967.

It can be written as a sum of positive squares in 4 ways, for example, as 4272489 + 3426201 = 2067^2 + 1851^2 .

It is a super-2 number, since 2×7698690² = 118539655432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9792 + ... + 10548.

Almost surely, 2^7698690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7698690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10110204).

7698690 is an abundant number, since it is smaller than the sum of its proper divisors (12521718).

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

7698690 is a wasteful number, since it uses less digits than its factorization.

7698690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 7698690 is about 2774.6513294466. The cubic root of 7698690 is about 197.4568831797.

The spelling of 7698690 in words is "seven million, six hundred ninety-eight thousand, six hundred ninety".