690498238 has 8 divisors (see below), whose sum is σ = 1043903232. Its totient is φ = 342530496.

The previous prime is 690498233. The next prime is 690498251. The reversal of 690498238 is 832894096.

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

It is a super-2 number, since 2×690498238² = 953575633362209288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690498191 and 690498200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690498233) 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, 1358995 + ... + 1359502.

It is an arithmetic number, because the mean of its divisors is an integer number (130487904).

Almost surely, 2^690498238 is an apocalyptic number.

690498238 is a deficient number, since it is larger than the sum of its proper divisors (353404994).

690498238 is a wasteful number, since it uses less digits than its factorization.

690498238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718626.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 690498238 is about 26277.3331599689. Note that the first 3 decimals coincide. The cubic root of 690498238 is about 883.8682322725.

The spelling of 690498238 in words is "six hundred ninety million, four hundred ninety-eight thousand, two hundred thirty-eight".