64250000 has 70 divisors (see below), whose sum is σ = 156208938. Its totient is φ = 25600000.

The previous prime is 64249981. The next prime is 64250009. The reversal of 64250000 is 5246.

It can be written as a sum of positive squares in 7 ways, for example, as 58736896 + 5513104 = 7664^2 + 2348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64250009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 249872 + ... + 250128.

Almost surely, 2^64250000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78104469).

64250000 is an abundant number, since it is smaller than the sum of its proper divisors (91958938).

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

64250000 is an frugal number, since it uses more digits than its factorization.

64250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 64250000 is about 8015.6097709407. The cubic root of 64250000 is about 400.5201566328.

Adding to 64250000 its reverse (5246), we get a palindrome (64255246).

It can be divided in two parts, 64 and 250000, that multiplied together give a square (16000000 = 4000²).

The spelling of 64250000 in words is "sixty-four million, two hundred fifty thousand".