68599440 has 320 divisors, whose sum is σ = 291648000. Its totient is φ = 14432256.

The previous prime is 68599429. The next prime is 68599459. The reversal of 68599440 is 4499586.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 196386 + ... + 196734.

It is an arithmetic number, because the mean of its divisors is an integer number (911400).

Almost surely, 2^68599440 is an apocalyptic number.

68599440 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 68599440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145824000).

68599440 is an abundant number, since it is smaller than the sum of its proper divisors (223048560).

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

68599440 is a wasteful number, since it uses less digits than its factorization.

68599440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 68599440 is about 8282.4778901003. The cubic root of 68599440 is about 409.3613694353.

The spelling of 68599440 in words is "sixty-eight million, five hundred ninety-nine thousand, four hundred forty".