64225290 has 16 divisors (see below), whose sum is σ = 154140768. Its totient is φ = 17126736.

The previous prime is 64225289. The next prime is 64225313. The reversal of 64225290 is 9252246.

64225290 = 3582² + 3583² + ... + 3586².

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2140843 = 64225290 / (6 + 4 + 2 + 2 + 5 + 2 + 9 + 0).

It is a zygodrome in base 4.

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, 1070392 + ... + 1070451.

It is an arithmetic number, because the mean of its divisors is an integer number (9633798).

Almost surely, 2^64225290 is an apocalyptic number.

64225290 is an abundant number, since it is smaller than the sum of its proper divisors (89915478).

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

64225290 is a wasteful number, since it uses less digits than its factorization.

64225290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140853.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 64225290 is about 8014.0682552621. The cubic root of 64225290 is about 400.4688045078.

The spelling of 64225290 in words is "sixty-four million, two hundred twenty-five thousand, two hundred ninety".