690957540 has 480 divisors, whose sum is σ = 2754850560. Its totient is φ = 141087744.

The previous prime is 690957523. The next prime is 690957577. The reversal of 690957540 is 45759096.

It is a happy number.

690957540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6339006 + ... + 6339114.

It is an arithmetic number, because the mean of its divisors is an integer number (5739272).

Almost surely, 2^690957540 is an apocalyptic number.

690957540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690957540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377425280).

690957540 is an abundant number, since it is smaller than the sum of its proper divisors (2063893020).

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

690957540 is a wasteful number, since it uses less digits than its factorization.

690957540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 690957540 is about 26286.0712165207. The cubic root of 690957540 is about 884.0641644491.

The spelling of 690957540 in words is "six hundred ninety million, nine hundred fifty-seven thousand, five hundred forty".