68536490 has 16 divisors (see below), whose sum is σ = 134580960. Its totient is φ = 24922320.

The previous prime is 68536463. The next prime is 68536547. The reversal of 68536490 is 9463586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311420 + ... + 311639.

It is an arithmetic number, because the mean of its divisors is an integer number (8411310).

Almost surely, 2^68536490 is an apocalyptic number.

68536490 is a deficient number, since it is larger than the sum of its proper divisors (66044470).

68536490 is a wasteful number, since it uses less digits than its factorization.

68536490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623077.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 68536490 is about 8278.6768266433. The cubic root of 68536490 is about 409.2361148433.

The spelling of 68536490 in words is "sixty-eight million, five hundred thirty-six thousand, four hundred ninety".