690028390 has 16 divisors (see below), whose sum is σ = 1242624240. Its totient is φ = 275884000.

The previous prime is 690028363. The next prime is 690028403. The reversal of 690028390 is 93820096.

It is a super-2 number, since 2×690028390² = 952278358011984200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8640 + ... + 38140.

It is an arithmetic number, because the mean of its divisors is an integer number (77664015).

Almost surely, 2^690028390 is an apocalyptic number.

690028390 is a deficient number, since it is larger than the sum of its proper divisors (552595850).

690028390 is a wasteful number, since it uses less digits than its factorization.

690028390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31847.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 690028390 is about 26268.3914619834. The cubic root of 690028390 is about 883.6677113893.

The spelling of 690028390 in words is "six hundred ninety million, twenty-eight thousand, three hundred ninety".