654690 has 32 divisors (see below), whose sum is σ = 1592640. Its totient is φ = 172224.

The previous prime is 654679. The next prime is 654697. The reversal of 654690 is 96456.

It is a super-2 number, since 2×654690² = 857237992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (654697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4092 + ... + 4248.

It is an arithmetic number, because the mean of its divisors is an integer number (49770).

2⁶⁵⁴⁶⁹⁰ is an apocalyptic number.

654690 is an abundant number, since it is smaller than the sum of its proper divisors (937950).

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

654690 is a wasteful number, since it uses less digits than its factorization.

654690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 654690 is about 809.1291615064. The cubic root of 654690 is about 86.8317530553.

The spelling of 654690 in words is "six hundred fifty-four thousand, six hundred ninety".