64253240 has 16 divisors (see below), whose sum is σ = 144569880. Its totient is φ = 25701280.

The previous prime is 64253227. The next prime is 64253243. The reversal of 64253240 is 4235246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64253243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803126 + ... + 803205.

Almost surely, 2^64253240 is an apocalyptic number.

It is an amenable number.

64253240 is an abundant number, since it is smaller than the sum of its proper divisors (80316640).

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

64253240 is a wasteful number, since it uses less digits than its factorization.

64253240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606342 (or 1606338 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64253240 is about 8015.8118740400. The cubic root of 64253240 is about 400.5268889986.

Adding to 64253240 its reverse (4235246), we get a palindrome (68488486).

The spelling of 64253240 in words is "sixty-four million, two hundred fifty-three thousand, two hundred forty".