64926390 has 32 divisors (see below), whose sum is σ = 157580640. Its totient is φ = 17118464.

The previous prime is 64926377. The next prime is 64926391. The reversal of 64926390 is 9362946.

It is a happy number.

It is a super-2 number, since 2×64926390² = 8430872236864200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64926391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9489 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (4924395).

Almost surely, 2^64926390 is an apocalyptic number.

64926390 is an abundant number, since it is smaller than the sum of its proper divisors (92654250).

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

64926390 is a wasteful number, since it uses less digits than its factorization.

64926390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24416.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 64926390 is about 8057.6913567101. The cubic root of 64926390 is about 401.9207412863.

The spelling of 64926390 in words is "sixty-four million, nine hundred twenty-six thousand, three hundred ninety".