64278494 has 24 divisors (see below), whose sum is σ = 114070680. Its totient is φ = 27078576.

The previous prime is 64278493. The next prime is 64278497. The reversal of 64278494 is 49487246.

It is a super-3 number, since 3×64278494³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64278493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224 + ... + 11340.

It is an arithmetic number, because the mean of its divisors is an integer number (4752945).

Almost surely, 2^64278494 is an apocalyptic number.

64278494 is a deficient number, since it is larger than the sum of its proper divisors (49792186).

64278494 is a wasteful number, since it uses less digits than its factorization.

64278494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192 (or 11185 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 64278494 is about 8017.3869808062. The cubic root of 64278494 is about 400.5793562939.

The spelling of 64278494 in words is "sixty-four million, two hundred seventy-eight thousand, four hundred ninety-four".