690279890 has 16 divisors (see below), whose sum is σ = 1250735040. Its totient is φ = 274282800.

The previous prime is 690279853. The next prime is 690279893. The reversal of 690279890 is 98972096.

It is not an unprimeable number, because it can be changed into a prime (690279893) 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, 227060 + ... + 230079.

It is an arithmetic number, because the mean of its divisors is an integer number (78170940).

Almost surely, 2^690279890 is an apocalyptic number.

690279890 is a deficient number, since it is larger than the sum of its proper divisors (560455150).

690279890 is a wasteful number, since it uses less digits than its factorization.

690279890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457297.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 690279890 is about 26273.1781480658. The cubic root of 690279890 is about 883.7750574238.

The spelling of 690279890 in words is "six hundred ninety million, two hundred seventy-nine thousand, eight hundred ninety".