690618240 has 384 divisors, whose sum is σ = 2686582080. Its totient is φ = 162201600.

The previous prime is 690618239. The next prime is 690618259. The reversal of 690618240 is 42816096.

690618240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 690618195 and 690618204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1722040 + ... + 1722440.

Almost surely, 2^690618240 is an apocalyptic number.

690618240 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 690618240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343291040).

690618240 is an abundant number, since it is smaller than the sum of its proper divisors (1995963840).

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

690618240 is a wasteful number, since it uses less digits than its factorization.

690618240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 690618240 is about 26279.6164355570. The cubic root of 690618240 is about 883.9194319261.

The spelling of 690618240 in words is "six hundred ninety million, six hundred eighteen thousand, two hundred forty".