64457250 has 128 divisors (see below), whose sum is σ = 189326592. Its totient is φ = 14400000.

The previous prime is 64457249. The next prime is 64457287. The reversal of 64457250 is 5275446.

64457250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106950 + ... + 107550.

It is an arithmetic number, because the mean of its divisors is an integer number (1479114).

Almost surely, 2^64457250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64457250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94663296).

64457250 is an abundant number, since it is smaller than the sum of its proper divisors (124869342).

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

64457250 is a wasteful number, since it uses less digits than its factorization.

64457250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 64457250 is about 8028.5272622069. The cubic root of 64457250 is about 400.9503444919.

It can be divided in two parts, 6445 and 7250, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 64457250 in words is "sixty-four million, four hundred fifty-seven thousand, two hundred fifty".