68533290 has 224 divisors, whose sum is σ = 226644480. Its totient is φ = 14556672.

The previous prime is 68533277. The next prime is 68533303. The reversal of 68533290 is 9233586.

It is an interprime number because it is at equal distance from previous prime (68533277) and next prime (68533303).

It is a super-3 number, since 3×68533290³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 867471 + ... + 867549.

Almost surely, 2^68533290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68533290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113322240).

68533290 is an abundant number, since it is smaller than the sum of its proper divisors (158111190).

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

68533290 is a wasteful number, since it uses less digits than its factorization.

68533290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 68533290 is about 8278.4835567874. The cubic root of 68533290 is about 409.2297456039.

The spelling of 68533290 in words is "sixty-eight million, five hundred thirty-three thousand, two hundred ninety".