690220240 has 80 divisors (see below), whose sum is σ = 1655269056. Its totient is φ = 267494400.

The previous prime is 690220231. The next prime is 690220259. The reversal of 690220240 is 42022096.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533995 + ... + 535285.

Almost surely, 2^690220240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827634528).

690220240 is an abundant number, since it is smaller than the sum of its proper divisors (965048816).

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

690220240 is a wasteful number, since it uses less digits than its factorization.

690220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 690220240 is about 26272.0429354095. The cubic root of 690220240 is about 883.7495997790.

The spelling of 690220240 in words is "six hundred ninety million, two hundred twenty thousand, two hundred forty".