64253740 has 24 divisors (see below), whose sum is σ = 137147472. Its totient is φ = 25279680.

The previous prime is 64253729. The next prime is 64253759. The reversal of 64253740 is 4735246.

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, 25114 + ... + 27553.

It is an arithmetic number, because the mean of its divisors is an integer number (5714478).

Almost surely, 2^64253740 is an apocalyptic number.

It is an amenable number.

64253740 is an abundant number, since it is smaller than the sum of its proper divisors (72893732).

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

64253740 is a wasteful number, since it uses less digits than its factorization.

64253740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52737 (or 52735 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 64253740 is about 8015.8430623360. The cubic root of 64253740 is about 400.5279279237.

Adding to 64253740 its reverse (4735246), we get a palindrome (68988986).

The spelling of 64253740 in words is "sixty-four million, two hundred fifty-three thousand, seven hundred forty".