68732390 has 16 divisors (see below), whose sum is σ = 123882480. Its totient is φ = 27456480.

The previous prime is 68732371. The next prime is 68732393. The reversal of 68732390 is 9323786.

It is a super-2 number, since 2×68732390² = 9448282870224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68732393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4145 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (7742655).

Almost surely, 2^68732390 is an apocalyptic number.

It is a pronic number, being equal to 8290×8291.

68732390 is a deficient number, since it is larger than the sum of its proper divisors (55150090).

68732390 is a wasteful number, since it uses less digits than its factorization.

68732390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9127.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 68732390 is about 8290.4999849225. The cubic root of 68732390 is about 409.6256547436.

The spelling of 68732390 in words is "sixty-eight million, seven hundred thirty-two thousand, three hundred ninety".