64424390 has 16 divisors (see below), whose sum is σ = 122785632. Its totient is φ = 24253824.

The previous prime is 64424389. The next prime is 64424413. The reversal of 64424390 is 9342446.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189314 + ... + 189653.

It is an arithmetic number, because the mean of its divisors is an integer number (7674102).

Almost surely, 2^64424390 is an apocalyptic number.

64424390 is a deficient number, since it is larger than the sum of its proper divisors (58361242).

64424390 is a wasteful number, since it uses less digits than its factorization.

64424390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378991.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64424390 is about 8026.4805487835. The cubic root of 64424390 is about 400.8821987165.

The spelling of 64424390 in words is "sixty-four million, four hundred twenty-four thousand, three hundred ninety".