290683640 has 64 divisors (see below), whose sum is σ = 706527360. Its totient is φ = 106997760.

The previous prime is 290683639. The next prime is 290683651. The reversal of 290683640 is 46386092.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 290683594 and 290683603.

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, 223472 + ... + 224768.

It is an arithmetic number, because the mean of its divisors is an integer number (11039490).

Almost surely, 2^290683640 is an apocalyptic number.

290683640 is a gapful number since it is divisible by the number (20) 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 290683640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353263680).

290683640 is an abundant number, since it is smaller than the sum of its proper divisors (415843720).

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

290683640 is a wasteful number, since it uses less digits than its factorization.

290683640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 290683640 is about 17049.4469118502. The cubic root of 290683640 is about 662.4303114071.

The spelling of 290683640 in words is "two hundred ninety million, six hundred eighty-three thousand, six hundred forty".