690538000 has 80 divisors (see below), whose sum is σ = 1675964160. Its totient is φ = 275184000.

The previous prime is 690537997. The next prime is 690538003. The reversal of 690538000 is 835096.

It is an interprime number because it is at equal distance from previous prime (690537997) and next prime (690538003).

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

It is not an unprimeable number, because it can be changed into a prime (690538003) 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, 757545 + ... + 758455.

It is an arithmetic number, because the mean of its divisors is an integer number (20949552).

Almost surely, 2^690538000 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 690538000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837982080).

690538000 is an abundant number, since it is smaller than the sum of its proper divisors (985426160).

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

690538000 is a wasteful number, since it uses less digits than its factorization.

690538000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 690538000 is about 26278.0897327032. The cubic root of 690538000 is about 883.8851976521.

The spelling of 690538000 in words is "six hundred ninety million, five hundred thirty-eight thousand".