64570740 has 96 divisors (see below), whose sum is σ = 205000320. Its totient is φ = 15054336.

The previous prime is 64570739. The next prime is 64570741. The reversal of 64570740 is 4707546.

It is an interprime number because it is at equal distance from previous prime (64570739) and next prime (64570741).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64570741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12642 + ... + 16998.

It is an arithmetic number, because the mean of its divisors is an integer number (2135420).

Almost surely, 2^64570740 is an apocalyptic number.

64570740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64570740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102500160).

64570740 is an abundant number, since it is smaller than the sum of its proper divisors (140429580).

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

64570740 is a wasteful number, since it uses less digits than its factorization.

64570740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401 (or 4399 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 64570740 is about 8035.5920752612. The cubic root of 64570740 is about 401.1855245244.

The spelling of 64570740 in words is "sixty-four million, five hundred seventy thousand, seven hundred forty".