64453240 has 16 divisors (see below), whose sum is σ = 145019880. Its totient is φ = 25781280.

The previous prime is 64453237. The next prime is 64453241. The reversal of 64453240 is 4235446.

It is a junction number, because it is equal to n+sod(n) for n = 64453199 and 64453208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64453241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805626 + ... + 805705.

Almost surely, 2^64453240 is an apocalyptic number.

It is an amenable number.

64453240 is an abundant number, since it is smaller than the sum of its proper divisors (80566640).

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

64453240 is a wasteful number, since it uses less digits than its factorization.

64453240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611342 (or 1611338 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 64453240 is about 8028.2775238528. The cubic root of 64453240 is about 400.9420297085.

Adding to 64453240 its reverse (4235446), we get a palindrome (68688686).

The spelling of 64453240 in words is "sixty-four million, four hundred fifty-three thousand, two hundred forty".